Thoman, Richard S. 1919- The geography of economic activity / Richard S. Thoman and Peter B. Corbin. - 3rd ed. - New York : McGraw-Hill, c1974 - viii, 420 p. : ill. ; 24 cm. - McGraw-Hill series in geography . - McGraw-Hill series in geography . Includes index. Bibliography: p. 403-408 ISBN: 0070642079 Subjects--Topical Terms: Economic geography. Dewey Class. No.: 330.9 / THG 1974