A half-century of evolution, with special reference to the effect of geographical changes on animal life /
Packard, Alpheus S.
A half-century of evolution, with special reference to the effect of geographical changes on animal life / an address by Alpheus S. Packard - Salem, Mass. : Salem Press, 1898 - 48 p. ; 25 cm - Proceedings of the American association for the advancement of science ; 47 .
A half-century of evolution, with special reference to the effect of geographical changes on animal life / an address by Alpheus S. Packard - Salem, Mass. : Salem Press, 1898 - 48 p. ; 25 cm - Proceedings of the American association for the advancement of science ; 47 .