(Federal Republic of Germany)E.Bartholome...et al;by (USSR)I.P.Mukhlynov; by (Federal Republic of Germany)E.Colomer...et al;by (India)F.A.Cotton; (Federal Republic of Germany)E.B.Saff...et al;by (France)L.V.Ahlfors; by (Federal Republic of Germany)F.J.Haydn...et al;by (USSR)D.Shostakovich; by (Federal Republic of Germany)B.Bartok;by (USSR)S.Prokofiev; (Federal Republic of Germany)S.Mardesin...et al;by (United States)M.A.Armstrong; (Federal Republic of Germany)C.A.Brebbia...et al;by (Japan)S.Zahorski; by (Federal Republic of Germany)G.Mathe...et al;by (United States)P.J.Disaia; by (Federal Republic of Germany)J.K.Goyal;by (USSR)M.L.Krasonv; by (Federal Republic of Germany)C.P.Rourke...et al;by (United States)D.Rolfsen;