000
00261nam a2200121 4500
082
_a
632 NYV-F
100
_a
Nyvall Robert F.
245
_a
Field Crop Diseases
250
_a
3rd
260
_a
Ames
_b
Iowa State
_c
1999
300
_a
1099
942
_2
ddc
_c
BK
_0
1
999
_c
127593
_d
127593