000			00513cam a2200169 a 4500
020			_a0444886753
050	0	0	_aSB185 _b.F54 1992
245	0	0	_aField crop ecosystems / _cedited by, C.J. Pearson.
260			_aAmsterdam ; _aNew York : _bElsevier, _c1992.
300			_axiii, 576 p. : _bill. (some col.), maps ;
650		0	_aField crops.
650		0	_aField crops
650		0	_aCropping systems.
700	1		_aPearson, C. J.
856	4	2	_uhttp://www.loc.gov/catdir/enhancements/fy0601/92121903-d.html
942			_cLL
999			_c4071 _d4071