000 00298nam a2200133Ia 4500
008 160316s1993 xxu||||| |||| 00| 0 eng d
020 _a
100 _aDonald L Sparks
245 _aAdvances In Agronomy
250 _a1
260 _aNEW YORK
_bACADEMIC PRESS
_c1993
300 _a277
700 _a
_a
999 _c24842
_d24842