Deserts on the march.

Bibliographic Details
Main Author:	Sears, Paul B. (Paul Bigelow), 1891-1990
Format:	Book
Language:	English
Published:	Norman : University of Oklahoma Press, 1947.
Edition:	[2d ed., rev.].
Subjects:	Agriculture > United States. Natural resources > United States. Agriculture > Economic aspects > United States. United States > Economic conditions.