000 00261nam a2200121 4500
082 _a632 NYV-F
100 _aNyvall Robert F.
245 _aField Crop Diseases
250 _a3rd
260 _aAmes
_bIowa State
_c1999
300 _a1099
942 _2ddc
_cBK
_01
999 _c127593
_d127593