DETWYLER, T. R. (1971). Man's Impact On Environment Thomas R. Detwyler. McGraw-Hill.
Lua i Stíl Chicago (17ú heag.)DETWYLER, Thomas R. Man's Impact On Environment Thomas R. Detwyler. McGraw-Hill, 1971.
Lua MLA (8ú heag.)DETWYLER, Thomas R. Man's Impact On Environment Thomas R. Detwyler. McGraw-Hill, 1971.
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