911.3 W Whitebeck, Hay Hughes, 1871-1939 Economic geography of South America, by R. H. Whitbeck... and Frank E. Williams... assisted by William F. Christians... 3d ed. New York, and London, McGraw-Hill book company, inc., 1940. xi, 469 p. incl. front., illus.(incl. maps) diagrs. 23 cm. (Half-title: McGraw-Hill series in geography; V. C. Finch, Consulting editor) Bibliography: p. 237-4-52