by (United States)M.Grosmann;by (Federal Republic of Germany)O.N.Stavroudis; by (United States)P.Zuman;by (Federal Republic of Germany)D.I.Davies; by (United States)M.Holt;by (Federal Republic of Germany)L.D.Landau; by (United States)W.Greub;by (Federal Republic of Germany)A.Haraux; by (United States)B.Gellbaum;by (Federal Republic of Germany)Z.Nitecki; by (United States)M.Aumiaux;by (Federal Republic of Germany)D.F.Barbe; by (United States)M.Orchin;by (Federal Republic of Germany)F.K.Beisteins; by (United States)R.P.Sperb;by (Federal Republic of Germany)O.Vejvoda; by (United States)W.K.Grassman;by (Federal Republic of Germany)A.Hilbert; by (United States)C.Kittel;by (Federal Republic of Germany)O.Madelung;