Migration of racial groups in the United States, 1920-1930 / C.W. Thornthwaite

From Thornthwaite's 1934 edition of Internal Migration in the United States.; "Lith. A. Hoen & Co., Inc."; In right margin: "Plate VII."; Table of Contents: A. Native whites -- B. Negroes -- C. Foreign born whites -- D. Total population;Color;1:85,000 00

Native woody plants of the United States : their erosion-control and wildlife values /

no.30

Native woody plants of the United States : their erosion-control and wildlife values /

no.30