000			00443nam a2200157Ia 4500
008			130225s9999 xx 000 0 und d
020			_a9781107610712
080			_a631.95 _bC74C
100			_aConnor, David J
245			_aCrop ecology: productivity and management in agricultural systems
250			_a2nd ed.
260			_aCambridge, New York _bCambridge University Press _c2011
300			_a556p.
901			_a288170
942			_cB _2udc
999			_c18257 _d18257