by (United States)G.T.Kurian;by (Federal Republic of Germany)E.Glaber; by (United States)G.T.Kurian;by (Federal Republic of Germany)D.Kuhne; by (United States)G.T.Kurian;by (Federal Republic of Germany)R.Hahn; by (United States)D.A.Marcus;by (Federal Republic of Germany)E.Hecke; by (United States)W.K.Grassman;by (Federal Republic of Germany)A.Hilbert; by (United States)F.H.Croon;by (Federal Republic of Germany)A.Dold; by (United States)D.Seyferth;by (Federal Republic of Germany)W.P.Weber; by (United States)C.R.Parish;by (Federal Republic of Germany)M.Lerman; by (United States)P.J.Bickel;by (Federal Republic of Germany)W.Eberl; by (United States)P.Zuman;by (Federal Republic of Germany)D.I.Davies;