(United States)S.Barber;by (Federal Republic of Germany)J.B.Cramer; by (United States)S.Lang;by (Federal Republic of Germany)S.G.Krantz; by (United States)R.S.Pierce;by (Federal Republic of Germany)S.B.Rao; by (United States)A.E.Wier;by (Federal Republic of Germany)B.Bartok; by (United States)W.S.Hatcher;by (Federal Republic of Germany)J.C.Jantzen; (United States)E.W.Cheney;by (Federal Republic of Germany)L.L.Schumaker; by (United States)A.Beiser;by (Federal Republic of Germany)S.Haykin; by (United States)W.Greub;by (Federal Republic of Germany)A.Haraux; by (United States)M.R.Speigel;by (Federal Republic of Germany)J.B.Conway; (United States)B.Pullman;by (Federal Republic of Germany)B-O.Kuppers;