000			00370nam a2200145Ia 4500
008			180612s9999||||xx |||||||||||||| ||und||
020			_a1566702771
041			_aen
082			_a631.422
100			_aL Brussaard;
245		0	_aSoil ecology in sustainable agricultural systems
260			_aBoca Raton _bCRC/Lewis Publishers, _c1997
300			_a168 p.
942			_cPR
999			_c54534 _d54534