During his visit in Poland, Castro relates Cuba's position on a conversation taken place in Moscow and why it may be of interest to the Cubans. Gomulka raises the issue of the missiles. In Gomulka's opinion two factors were decisive: contradictions which arose within the socialist camp and the policy which was conducted by Khrushchev. Gomulka is assured that US is capable of conducting a war with Cuba by way of conventional weapons, it does not have to use nuclear weapons. It is clear that the socialist camp and the USSR cannot defend Cuba in any other way but by using nuclear weapons. If a conflict is meant to be, then it will be a nuclear conflict, there is no other way. Gomulka further raises a question whether to go into a nuclear war or not. Castro disagrees with a manner nuclear weapons were withdrawn from Cuba by Soviets. Khruchshev explained that he did not have time. Per Gomulka, Khrushchev conducted a policy which was not thought-out and which was all-out. Gomulka further discusses his talks with Chinese and Vietnamese comrades re: nuclear weapons issue.

In a memorandum, Konstantin Tellalov, Head of the Foreign Policy and International Relations Department of the Central Committee of BCP, and Foreign Minister Ivan Bashev evaluate Cuban-Bulgarian relations. Tellalov and Bashev contextualize Cuba's development both nationally and internationally. Cuba's primary concerns are related to its economy (re: housing, rationing, embargo). Cuba's leadership continues to display a limited understanding of Marxism-Leninism, scientific planning (central planning), and the importance of COMECON. Taking into consideration the Bulgarian delegation’s recent visit to Cuba, they stress the importance of Cuba's success and the need for a radical, all-embracing commitment to relations.

The Bulgarian Communist Party Politburo report includes three main documents: a protocol and resolution with notes, a top secret information note, and a top secret protocol from 30 July 1970. The first section includes the Politburo's approval of the delegation's negotiations with Cuba, proposals to restructure economic partnership, and the Bulgarian delegation's statements on miscommunication between Cuba and Bulgaria. The second section, top secret information note, summarizes important exchanges during the Bulgarian visit to Cuba (e.g. Zhivkov's discussion on the importance of economic cooperation (COMECON) to the development of socialism). The third section, the top secret protocol, includes portions of a conversation between Bulgarian delegation and Cuban Politburo members. Castro summarizes ideas exchanged during the state visit.

Bulgarian Ambassador to Cuba Stefan Petrov analyzes Cuba’s domestic and foreign policies in an informational report to Bulgarian leader Todor Zhivkov. Petrov criticizes Cuban Communist Party policies and claims they are incompatible with Marxism-Leninism (e.g. Cuba’s focus on conflict between imperialism and national liberation rather than socialism and capitalism). Cuba has adopted an anti-Soviet attitude and believes Cuban leadership is the vanguard of communism. Petrov reviews Cuba’s conflicting relations with Latin American communist parties and Cuba's support to guerilla movements in the region. Petrov notes that Bulgarian-Cuban relations remain positive.

In a memorandum to the Central Committee of the Bulgarian Communist Party Politburo, Gero Grozev, Deputy Minister of Foreign Affairs, critiques the Cuban Communist Party and its approach to building socialism. Grozev describes Cuba’s increasingly poor relations with European communist parties, interference in Latin American affairs, and misunderstanding of Marxist-Leninist principles. Grozev continues describing Cuban leaders as committed functionaries unaware of their mistakes. To correct Cuba’s mistakes socialist countries should increase contact with the Cuban government and help it develop economically and mature politically.

The Bulgarian Embassy in Havana reports to the Central Committee of the Bulgarian Communist Party and the Bulgarian Ministry of Foreign Affairs on political, economic, and cultural developments in Cuba circa 1963. Cuba is politically united, but is experiencing economic hardship after the “Caribbean Crisis” primarily because of the US embargo. In the report, embassy staff reviews developments between socialist countries and Cuba throughout 1963. Some examples include communist aid to Cuba after Hurricane Flora and Cuba’s stance on Sino-Soviet relations. Bulgaria’s show of solidarity resulted in concrete political, economic, and cultural cooperation. Embassy staff notes the drawbacks and benefits of Bulgaria’s relationship with Cuba.

Bulgaria’s Ambassador to Cuba Konstantin Michev reports on the reorganization of Cuba’s revolutionary government. In the report Michev notes that the government is realigning itself with the intent to become socialist, though not publicizing it. The realignment includes the creation of ministries and committees to oversee the transition and affairs of the country. Fidel Castro, Raul Castro, and Ernesto Guevara are assigned key posts to manage the transition. Through the help of socialist countries, Cuba is developing independent of USA, which previously hampered Cuba’s growth and development. Michev also notes that the Cuban government is prepared to defend itself against counter-revolution and US intervention into Cuban affairs.

The document includes excerpts from a Bulgarian delegation's report on their visit to Latin America in 1960. The excerpt covers the delegation's visit to Cuba.

Avramova and Agnelov report Cuba's desire to establish diplomatic and cultural relations with Bulgaria. Cuba's interest paramountly involve trade. Avramova and Angelov summarize meetings with important government officials, particulalry Ernesto Guevara, head of the National Bank, and Raul Castro, Minister of Armed Forces. Topics include: the development of the revolution against the Batista government, post-Batista power struggles, geographical fatalism and US influence, Cuba's challenges (e.g. illiteracy, the lack of specialists), land and agricultural reform, construction, industrialization. The delegation recommends the establishment of official relations with Cuba and an invitation for Raul Castro to visit Bulgaria.

A visit of Soviet Premier Alexei Kosygin from 26-30 June 1967 prompts this report from the Mexican Embassy in Havanna to the Secretary of Foreign Relations in Mexico City. They discuss: the position assumed by the Cuban Government and Communist Party in relation to Latin America, the Middle East and Vietnam, the internal administration of Cuba and the political operation in Cuba.

Rapacki reports on a meeting with the ORI [Organizaciones Revolucionarias Integradas], including: Fidel Castro, Raul Castro, [President Osvaldo] Dorticos [Torrado], Blas Roca, [and Emilio] Aragones [Navarro]. They discussed general issues of coordinating sugar trade, agricultural policy, policies toward the church, diplomatic visits, and the most current topic of the Escalante affair.