The course of evolution by differentiation or divergent mutation rather than by selection /

Bibliographic Details
Main Author:	Willis, J. C. (John Christopher), 1868-1958
Format:	Book
Language:	English
Published:	Cambridge [England] : [New York] : The University press; [Macmillan], 1940.
Subjects:	Evolution. Natural selection. Variation (Biology)

Description
Physical Description:	viii, 207 pages : illustrations (maps) diagrams ; 23 cm.
Bibliography:	"List of literature": pages [200]-202.