by (United Kingdom)M.P.Stevens;by (United States)H.Morawetz; by (United Kingdom)B.Magee;by (United States)H.Marcuse; by (United Kingdom)K.P.Sinha;by (United States)H.Blau; by (United Kingdom)M.A.Munem;by (United States)S.Maclane; by (United Kingdom)M.Slesser;by (United States)M.Modell; by (United Kingdom)A.D.Gordon;by (United States)H.Heyer; by (United Kingdom)H.James;by (United States)H.James; by (United Kingdom)J.V.Dawkins;by (United States)H.Batzer; by (United Kingdom)M.A.Arthurs;by (United States)F.Ayres; by (United Kingdom)M.Booth;by (United States)S.Barney;