TY  - BOOK
AU  - Louis L. Pyenson
TI  - Elements of plant protection
U1  - 632.3 
PY  - 1951///
CY  - New York
PB  - John Wiley and Sons Inc
N1  - Louis L. Pyenson: Elements of plant protection.  New York.  John Wiley and Sons Inc, 1951.--(632.3PYE)
ER  -