International law and municipal law : proceedings of the German-Soviet Colloquy on International Law at the Institut für Internationales Recht an der Universität Kiel, 4 to 8 May 1987 / edited by Grigory I. Tunkin and Rüdiger Wolfrum ; assistant editor, J. Enno Harders / TunkinGrigoriĭIvanovich, WolfrumRüdiger, German-SovietColloquyonInternationalLaw(1987:Kiel)