000 00296nam a2200133Ia 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 _c25457
_d25457