By Harold William Clayton, Denys Noel Straker
By Brian Simpson
By G.K. Hawes, Stanley Knight
By George Usher
By A. Fahn
By E. T. Brown
By V.A. Uspenskii
By A. C. Cave, B. Trinder
By P. Bridgewater, etc.
By F. M. Arscott
By Frederick H. Kanfer, Arnold P. Goldstein
By R.W. Eglese, G.K. Rand
By Ann M. Collier
By Keith J. Laidler
By Gordon Claridge, etc.
By Georg Schlesinger
By Ing. W. E. Eder, W. Gosling
By James H. Johnson
By Williams, J.
By W. R. Hindmarsh
By Torchinsky, Y.M.
By Clarke, M.R.B.
By Eckholm, E. P.
By Coats, Warren L., Khatkhate, Deena R.
By Lockhart, J.A.R., Wiseman, A.J.L.
By Hussey, D.E.
By Ben Butterworth
By OPEN UNIVE
By Kahn, Jack, Nursten, Jean P., Carroll, Howard C.M.