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1تقرير
المؤلفون: McDougall, Charles W., Denney, E. Wayne, Goodell, Dale N.
المصدر: United States Department of Agriculture, USDA Miscellaneous.
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2تقرير
المؤلفون: Denney, E. Wayne
المصدر: United States Department of Agriculture, Economic Research Service, Foreign Agricultural Economic Report (FAER).
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3تقرير
المؤلفون: Friend, Reed E., Denney, E. Wayne, Long, Mary E., Twomey, Thomas A.
المصدر: United States Department of Agriculture, Economic Research Service, Foreign Agricultural Economic Report (FAER).
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المساهمون: Friend, Reed Eugene (Sonstige beteiligte Personen); Denney, E. Wayne (Sonstige beteiligte Personen); Long, Mary E. (Sonstige beteiligte Personen); Twomey, Thomas A. (Sonstige beteiligte Personen)
المصدر: 1972