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010 _a
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040 _aDLC
_cDLC
_dBD-DhNSU
041 _aeng
050 0 0 _aS589.7
_b.P68 2000
082 0 0 _a630.277
_bP888e
100 1 _aPowers, Laura E.
245 0 0 _aEcological principles of agriculture /
_cLaura E. Powers and Robert McSorley
260 _aNew York :
_bDelmar,
_cc2000.
300 _axi, 433 p. :
_bill. ;
_c24 cm.
650 0 _aAgricultural ecology
700 1 _aMcSorley, Robert
942 _2lcc
_cBK