Colby, C. C., & Foster, A. (1940). Economic geography: Industries and resources of the commercial world. United States of America: United States of America Armed Forces.
Chicago ZitierstilColby, Charles C., und Alice Foster. Economic Geography: Industries and Resources of the Commercial World. United States of America: United States of America Armed Forces, 1940.
MLA ZitierstilColby, Charles C., und Alice Foster. Economic Geography: Industries and Resources of the Commercial World. United States of America: United States of America Armed Forces, 1940.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.