by (Federal Republic of Germany)W.P.Weber;by (United States)L.Zechmeister; by (Federal Republic of Germany)Z.M.Nashed;by (United States)M.Schechter; by (Federal Republic of Germany)H.Federer;by (United States)G.Kothe; by (Federal Republic of Germany)H.Ziegler;by (United States)M.W.Zemansky; by (Federal Republic of Germany)T.S.Huang;by (United States)L.Levi; by (Federal Republic of Germany)W.A.Mozart;by (United States)C.Nielsen; by (Federal Republic of Germany)W.G.Berl;by (United States)D.A.Skoog; by (Federal Republic of Germany)W.J.J.Rey;by (United States)M.R.Spiegel; by (Federal Republic of Germany)D.G.B.Edelen;by (United States)L.Meirovitch; by (Federal Republic of Germany)W.Demtroder;by (United States)M.D.Levenson;