by (Federal Republic of Germany)B.R.Nag;by (United Kingdom)B.K.Ridley; by (Federal Republic of Germany)G.Zumpe;by (United Kingdom)A.B.Tayler; by (Federal Republic of Germany)A.Levy;by (United Kingdom)A.Dodd; by (Federal Republic of Germany)G.A.Watson;by (United Kingdom)J.J.H.Miller; by (Federal Republic of Germany)B.R.Frieden;by (United Kingdom)A.D.Gordon; by (Federal Republic of Germany)K.Turian;by (United Kingdom)K.Turian; by (Federal Republic of Germany)B.F.Schutz;by (United Kingdom)V.I.Arnold; by (Federal Republic of Germany)J.Haydn;by (United Kingdom)B.Bartok; by (Federal Republic of Germany)A.Helbok;by (United Kingdom)F.A.Yates; by (Federal Republic of Germany)L.Beltzmann;by (United Kingdom)M.G.Bowler;