by (United Kingdom)P.Stanley;by (Federal Republic of Germany)P.S.Theocaris; by (United Kingdom)J.F.Lee;by (Federal Republic of Germany)J.Messer; by (United Kingdom)C.Lanczos;by (Federal Republic of Germany)S.Machado; by (United Kingdom)C.M.Will;by (Federal Republic of Germany)H.Weyl; by (United Kingdom)J.M.Ziman;by (Federal Republic of Germany)P.Bruesch; by (United Kingdom)B.Bartok;by (Federal Republic of Germany)V.L.Beethoven; by (United Kingdom)K.Petersen;by (Federal Republic of Germany)R.Artzy...et al; by (United Kingdom)D.C.Bassett;by (Federal Republic of Germany)H.Bottger; by (United Kingdom)R.C.Vaughan; (Federal Republic of Germany)M.I.Knopp; by (United Kingdom)R.Schumann;by (Federal Republic of Germany)J.Haydn;