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*1001 $aHeady, Earl O.$0(NO-TrBIB)90544755$_37251500
*24510$aAgricultural production functions$cEarl O. Heady, John L. Dillon
*260  $aIowa$bIowa state Univ. Press$c1966
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*7001 $aDillon, John L.$0(NO-TrBIB)2086935$_21128000
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