by J R Postgate | .
by D B Grigg | .
by Philip G Pardey | Johanes Roseboom.
by M H Arnold | .
by M R Jarman | .
by C S Barnard | J S Nix.
by Ernst Mayr | .
by P.S.Eagleson | .
by P. Calow | .
by J.C Wills | .
by H.K.Airy Shaw | .
by Mancur Olson | .
by A.S. Eddington | .
by John H. Kolb | .
by W.W .Rostow | .
by John Wishart | .
by R.H. Groves | .
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