Harlan, J. R. (1992). Crops & man (2nd ed.). Madison, Wis., USA: American Society of Agronomy : Crop Science Society of America.
Chicago Style CitationHarlan, Jack R. Crops & Man. 2nd ed. Madison, Wis., USA: American Society of Agronomy : Crop Science Society of America, 1992.
MLA CitationHarlan, Jack R. Crops & Man. 2nd ed. Madison, Wis., USA: American Society of Agronomy : Crop Science Society of America, 1992.