Title: Letopisʹ vazhneĭshikh sobytiĭ sovetsko-bolgarskikh otnosheniĭ i sotrudnichestva, 1944-1980 /
Authors: Pavlenko, V. V.; Sokhanʹ, P. S.; Instytut istoriï (Akademii͡a nauk Ukraïnsʹkoï RSR)
Publisher: "Naukova Dumka",
Year: 1981
Subjects: Soviet Union Foreign relations Bulgaria.; Bulgaria Foreign relations Soviet Union.