000 00582nam a22002057a 4500
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040 _aMX-TxCIM
090 _aREP-1497
100 1 _aWittwer, S.H.
111 2 _aAnnual meeting of the Agricultural Research Institute
_cNational Academy of Sciences
_dOct. 16, 1967
245 0 0 _aApproaching maximum capacity in production - biological limits of productivity
260 _aWashington, DC (USA) :,
_c1967
300 _a32 pages
340 _aPrinted
546 _aEnglish
595 _aRPC
942 _cREP
999 _c4658
_d4658