J. W. Burrow

ed.

London: Pelican Classics [1968].

Darwin, Ch. [1871]:

The Descent of Man.

Introduction by James Moore and Adrian Desmond. London: Penguin [2004].

Darwin, Ch. [1876]: “Sexual Selection in Relation to Monkeys,”

Nature

15 , 18-9.

Darwin, Ch. [1878-79]: “Fritz Müller on a Frog having Eggs on its Back,”

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