TY  - BOOK
AU  - " Hewitt, William B."
TI  - Plant health and quarantine in international transfer of genetic resources
U1  - 632.95:575(082.2) L7 
PB  - "Florida : CRC press, 1977"
KW  - " Chiarappa, Luigi"
KW  - Agricultural pests ; Plant disease ; Plant quarantine ; Seed pathology
ER  -