Havemeyer, L. (1938). Conservation of Our Natural Resources: Based on Van Hise's The Conservation of Natural Resources in the United States (1st (as supplied; verify).). The Macmillan Company.
Citace podle Chicago (17th ed.)Havemeyer, Loomis. Conservation of Our Natural Resources: Based on Van Hise's The Conservation of Natural Resources in the United States. 1st (as supplied; verify). New York: The Macmillan Company, 1938.
Citace podle MLA (9th ed.)Havemeyer, Loomis. Conservation of Our Natural Resources: Based on Van Hise's The Conservation of Natural Resources in the United States. 1st (as supplied; verify). The Macmillan Company, 1938.
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