Bulgaria-USSR: scientific and technical cooperation. 1. Days of Soviet science and technology in Sofia (solemn meeting: Todor Zhivkov in the presidium, Tsola Dragoycheva, Vladimir Kirillin). 2. Palace of the Universiade (the opening ceremony of the exhibition "Achievements of Soviet Science and Technology"). 3. "The birth of chemical giants" (Chemical complex in Devna: a factory of soda ash). 4. Development and introduction of electric filters at the cement plant in Devna. 5. Nuclear power plant in the city of Kozloduy. 6. Observatory named after Gagarin in the city of Stara Zagora (tracking of artificial satellites of the Earth). 7. The conveyor of VAZ (Automobile plant VAZ, conveyor belt: cars for export, the plant "Dynamo" in the city of Sliven: production and supply of starters and generators to the plants VAZ for cars brand "Zhiguli").