Clepper, H. E. (1979). Careers in conservation: Opportunities in natural resource management (2d ed.). Wiley.
Citace podle Chicago (17th ed.)Clepper, Henry Edward. Careers in Conservation: Opportunities in Natural Resource Management. 2d ed. New York: Wiley, 1979.
Citace podle MLA (8th ed.)Clepper, Henry Edward. Careers in Conservation: Opportunities in Natural Resource Management. 2d ed. Wiley, 1979.
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