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1Academic Journal
المؤلفون: Boyd, Glenn, Peter, Calderon, Smith, Ora, Mattick, L., Campbell, John, Cetas, R., Davis, Carl, Ora, Smith, Dearborn, C., Drazga, F., Eskew, R., Talley, F., Eastman, Paul, Ewing, E., Bohn, J., Layer, J., Fisher, Kenneth, Franklin, Everett, Lougheed, Everett, Frost, O.
المصدر: American Potato Journal; 1963, Vol. 40 Issue 9, p321-331, 11p