by Jermy J. Burdon | .
by Ernst Mayr | .
by N.W.Pirie | .
by A. J. Gibbs | .
by A. J. Gibbs | H.R.C. Meischke.
by O. H. Frankel | .
by O.H. Frankel | .
by Thomas J. Givnish | .
by David D. Davies | .
by Lynn Burnet | .
by Jeremy J. Burdon | .
by J.M.Palmer | .
by William P. Jacobs | .
by J. J. Burdon | .
by Jeremy Burgess | .
by D.H.Lewis | .
by Edward Hastings Chamberlin | .
by M. Dobb | .
by Ursula K. Hicks | .
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