by Paul Barker | .
by L.N. Balaam | .
by J.B.S. Haldane | .
by O'Brien,Patrick | .
by Geoffrey Lean | .
by R W Rideout | .
by Stephen A Marglin | .
by J Wilezynski | .
by Jevons, F.R | .
by Lewis, W Arthur | .
by Colin Bell | Howard Newby.
by A.D. Graham | .
by Harwood, John L | .
by Mclean, R C | .
by Pile,William | .
by G E Wickens | .
by Charles Furth | .
by B J Knapp | .
by M. D. Bennett | .
by C.D Darlington | .
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