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101 0 $aeng
135   $aur|||||||||||
181   $ctxt$2rdacontent
182   $cc$2rdamedia
183   $acr$2rdacarrier
200 00$aAgronomy in a changing world and research needs for the seventies /$feditors, C. A. Black [and three others]
210  1$aMadison, Wisconsin :$cAmerican Society of Agronomy :$cCrop Science Society of America :$cSoil Science Society of America,$d1971.
215   $a1 online resource (v, 65 pages)
225 1 $aASA Special Publication ;$vNumber 19
311   $a0-89118-139-3 
410  0$aASA special publication ;$vNumber 19.
606   $aAgricultural ecology
606   $aAgriculture$xResearch
615  0$aAgricultural ecology.
615  0$aAgriculture$xResearch.
676   $a577.55
702   $aBlack$b C. A$g(Charles Allen),
801  0$bWaSeSS
801  1$bWaSeSS
906   $aBOOK
912   $a9910830274303321
996   $aAgronomy in a changing world and research needs for the seventies$94002993
997   $aUNINA