by (Federal Republic of Germany)F.Hirzebruch;by (United Kingdom)C.R.F.Maunder; by (Federal Republic of Germany)D.Henry;by (United Kingdom)K.Hoffman; by (Federal Republic of Germany)A.Helbok;by (United Kingdom)F.A.Yates; by (Federal Republic of Germany)E.Horowitz;by (United Kingdom)R.C.Helt; by (Federal Republic of Germany)F.Schubert;by (United Kingdom)R.Schumann; by (Federal Republic of Germany)G.A.Watson;by (United Kingdom)J.J.H.Miller; by (Federal Republic of Germany)G.Zumpe;by (United Kingdom)A.B.Tayler; by (Federal Republic of Germany)H.Zassehaus;by (United Kingdom)A.Baker; by (Federal Republic of Germany)J.Brahms;by (United Kingdom)A.Copland; by (Federal Republic of Germany)B.R.Frieden;by (United Kingdom)A.D.Gordon;