Trudy XIII Mezhdunarodnogo kongressa po istorii nauki : Moskva, 18-24 avgusta 1971 g. = Actes du XIIIe Congrès international d'histoire des sciences, Moscou, 18-24 août, 1971 = Proceedings of XIIIth International Congress of the history of science, Moscow, Aug. 18-24, 1971 = Beiträge zum XIII Internationalen Kongress für Geschichte der Wissenschaft, Moskau, 18-24 August, 1971
Author
International Congress on the History of Sciences (13th : 1971 : Moscow, Russia)
Slavi︠a︡nite i sredizemnomorskii︠a︡t svi︠a︡t VI-XI vek : mezhdunaroden simpozium po slavi︠a︡nska arkheologii︠a︡, Sofii︠a︡, 23-29 april 1970 = Les slaves et le monde méditerranéen, VIe-XIe siècles : Symposium international d'archéologie slave, Sofia, 23-29 avril 1970
Author
Mezhdunaroden simpozium po slavi︠a︡nska arkheologii︠a︡ (1970 : Sofia, Bulgaria)
Problemi za geografii︠a︡ta na naselenieto i selishtata : [Sb. dokl. ot simpozium "Problemi na geografii︠a︡ta na naselenieto i selishtata". Varna, 1971]
Author
Simpozium Problemi na geografii︠a︡ta na naselenieto i selishtata (1971 : Druzhba, Bulgaria)