Does Evolution Occur Exclusively by Loss of Genetic Factors?

Robinson Street Books: Used and Rare

Title	Does Evolution Occur Exclusively by Loss of Genetic Factors?
Author	Castle, W.E.
Binding	PAPERBACK
Publisher	New York
Publisher Year	1919
Condition	Fair
Description	The American Naturalist, Vol. LIII, Nov.-Dec., 1919, pp. 555-558. Unfortunate damp-stain heal of spine else fair condition.* Offprint. First edition. Evolution. Genetics.