Royen, William Van. Fundamentals of economic geography : an introduction to the study of resources / William Van Royen and Nels A. Bengtson. - 5th ed. - New Delhi : Prentice-Hall of India, c 1971. - xviii, 613 p. : ill. ; 27 cm. Includes index. 337 337 Subjects--Topical Terms: Economics Geography. Dewey Class. No.: 911.3 / R814f