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MLA

Susan Chapman 1933-, and National Agricultural Library (U.S.). "Solar Energy Alternatives for Agriculture : January 1991-april 1993." , electronic. Print

APA

Susan Chapman 1933-, S. Chapman 1933-, & National Agricultural Library (U.S.), N. Agricultural Library (U.S.). (0000). Solar energy alternatives for agriculture : January 1991-April 1993.

Chicago

Susan Chapman 1933-, and National Agricultural Library (U.S.). "Solar energy alternatives for agriculture : January 1991-April 1993" (1993): electronic.