by (Federal Republic of Germany)H.Boll;by (United States)H.Insen; by (Federal Republic of Germany)D.Britz;by (United States)H.Bloom; by (Federal Republic of Germany)H.Bottger;by (United States)H.Shapley; by (Federal Republic of Germany)A.Dold;by (United States)S.Eilenberg; by (Federal Republic of Germany)A.Budo;by (United States)E.A.Desloge; by (Federal Republic of Germany)H.Federer;by (United States)G.Kothe; by (Federal Republic of Germany)A.H.Volkel;by (United States)J.S.Trefil; by (Federal Republic of Germany)C.Faith;by (United States)G.Fuller; by (Federal Republic of Germany)C.K.Rhodes;by (United States)H.C.Casey; by (Federal Republic of Germany)J.Bourgain;by (United States)P.L.Duren;