by (United Kingdom)A.B.Pippard;by (United Kingdom)P.Hagedorn; by (United Kingdom)A.B.Pippard;by (United Kingdom)A.B.Pippard; by (United Kingdom)A.L.Ternay;by (United Kingdom)D.Barton; by (United Kingdom)H.S.Harris;by (United Kingdom)B.Magee; by (United Kingdom)T.Hardy;by (United Kingdom)T.Hardy; by (United Kingdom)J.M.Ward; (United Kingdom)The Reader; by (United Kingdom)A.C.Gimson;by (United Kingdom)B.Haycraft; by (United Kingdom)J.B.Trapp;by (United Kingdom)W.H.Gardner; by (United Kingdom)A.Gurr;by (United Kingdom)A.Gurr; by (United Kingdom)A.S.Hornby;by (United Kingdom)K.Hudson;