by THEODOSIUS DOBZHANSKY.
by ERLING SVERDRUP.
by Y VARDAR.
by TAKASHI TAKAYAMA.
by OTTO GRAFF.
by LIANA BOLIS.
by G K WERTHEIM.
by D A BAKER.
by ABRAHAM A FRAENKEL.
by A M M MCFARQUHAR.
by A B R BEEMSTER.
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