by (United Kingdom)W.G.Richards...et al;by (USSR)Y.K.Syrkin; by (United Kingdom)F.W.Sears...et al;by (USSR)I.V.Savelyev; by (United Kingdom)N.Wrigley...et al;by (France)G.Michaud; by (United Kingdom)D.H.Willians...et al;by (United States)F.D.Snell; by (United Kingdom)A.C.Clarke...et al;by (United Kingdom)J.Cary; by (United Kingdom)P.W.Atkins...et al;by (United States)R.A.Alberty;