000 00604nam a2200193Ia 4500
919 _a007011
082 _a630.05
_bN49.49 "SER"
100 _aSparks, Donald L.
245 _aAdvances in agronomy. V.49 /ed. by Donald L. Sparks
260 _aSan Diego
_bAP
_c1993
964 _a
_b0
_c
_d
_e
_fED.
_g
999 _c6868
_d6868