Weaver, J. C. (1962). The geography of economic activity. Mc Graw-Hill Book Co.
Chicago-viite (17. p.)Weaver, John C. The Geography of Economic Activity. Mc Graw-Hill Book Co, 1962.
MLA-viite (8. p.)Weaver, John C. The Geography of Economic Activity. Mc Graw-Hill Book Co, 1962.
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