Internationaler Historikerkongreß (11, 1960, Stockholm)(6)
Conference on the Marxian Theory of Development (Warszawa, 1962)(4)
Pugwash Conference on Science and World Affairs (42. : 1992 : Berlin) (1992-)(4)
Pugwash Symposium (13, 1971, Frascati)(4)
Continuation Committee of the World Conference on Faith and Order(3)
Pugwash Conference on Science and World Affairs (1957-)(3)
Pugwash Conference on Science and World Affairs (22, 1972, Oxford)(3)
Pugwash Conference on Science and World Affairs (32. : 1982 : Warschau) (1982-)(3)
Weltkonferenz für Glauben und Kirchenverfassung (1. : 1927 : Lausanne) (1927-)(3)
World Federation of Scientific Workers (1946-1994)(3)
International Economic Conference (1952 : Moskau) (1952-)(2)
International Symposium on the Relations between Science and Technology (1969, Bratislava)(2)
Academia Republicii Populare Române (1948-1965)(1)
Akademie-Verlag (Berlin, Ost) (1946-)(1)
Aschendorffsche Verlagsbuchhandlung (Münster)(1)
B. H. Blackwell Ltd (Oxford) (1926-)(1)
Belgium / Commission for Relief(1)
Bundes-Wohn- und Siedlungsfonds(1)
Bureau du Congrés International des Siences Historiques (Stockholm)(1)