Whipple, G., & James, P. E. (1954). Using our earth. McMillan.
Chicago Style (17th ed.) CitationWhipple, Gertrude, and Preston E. James. Using Our Earth. Nueva York: McMillan, 1954.
MLA (9th ed.) CitationWhipple, Gertrude, and Preston E. James. Using Our Earth. McMillan, 1954.
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