000			00314nam a2200145Ia 4500
008			160316s1980 xxu||||| |||| 00| 0 eng d
020			_a
100			_aP S Carlson
245			_aBiology Of Crop Productivity
250			_a1
260			_aNEW YORK _bACADEMIC _c1980
300			_a471
700			_a _a
999			_c25456 _d25456
942	0	0	_02