000			nam a22 7a 4500
999			_c2484 _d2484
003			OSt
005			20180724143334.0
008			180724b xxu||||| |||| 00| 0 eng d
020			_a0521098432
082			_a630.9 _bGRI
100			_a Grigg, David B.
245			_aThe agricultural systems of the world : an evolutionary approach / _cBy David B Grigg.
260			_aNew York : _bCambridge University Press ; _c1974.
300			_aix ; 357 p., _c24 cm.
942			_2ddc _cBK