Economic geography / Zenas Carleton Staples and G Morell York Staples, Zenas Carleton. York, George Morell, 1882- jt. aut. Commercial geography. HF1027 .S67 1940 911.3 STE Includes bibliographical references and index. Cincinnati ; New York : Southwestern publishing, c1940. c1940. 1940 Text 702 p. : eng