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181   $ctxt$2rdacontent
182   $cc$2rdamedia
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200 00$aGenetic contributions to yield gains of five major crop plants /$fW. R. Fehr, editor
210  1$aMadison, Wisconsion :$cCrop Science Society of America :$cAmerican Society of Agronomy,$d1984.
215   $a1 online resource (101 pages)
225 1 $aCSSA Special Publication ;$vNumber 7
311   $a0-89118-517-8 
410  0$aCSSA special publication ;$vNumber 7.
606   $aField crops$xBreeding
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615  0$aField crops$xGenetics.
615  0$aCrop yields.
676   $a631.52
702   $aFehr$b W. R$g(Walter R.),$f1939-
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996   $aGenetic contributions to yield gains of five major crop plants$94021149
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