by Paul Barker | .
by S.R. Parker | .
by Richard Scase | .
by Mccaughan | .
by T.B Bottomore | .
by Craig R. Hickman | Michael A. Silva.
by L.N. Balaam | .
by J.B.S. Haldane | .
by Jevons, F.R | .
by Darlington, C D | .
by A.J. Brown | E.M. Burrows.
by David Macdonald | .
by Eric Rayner | .
by Nachtigall,Werner | .
by Bernard I. Palmer | .
by C.D Darlington | .
by Bertrand Russell | .
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