Cumberland, J. H. (1973). Regional development: Experiences and prospects in the United states of America (2nd ed.). Mouton.
Citace podle Chicago (17th ed.)Cumberland, John H. Regional Development: Experiences and Prospects in the United States of America. 2nd ed. The Hague: Mouton, 1973.
Citace podle MLA (9th ed.)Cumberland, John H. Regional Development: Experiences and Prospects in the United States of America. 2nd ed. Mouton, 1973.
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