TY  - BOOK
AU  - John Charles Walker
TI  - Plant pathology
U1  - 632.3 
PY  - 1950///
CY  - New York
PB  - Mc Graw Hill Book Co
N1  - John Charles Walker: Plant pathology.  New York.  Mc Graw Hill Book Co, 1950.--(632.3WAL)
ER  -