TY  - BOOK
AU  - BOKX DE, J.A
TI  - Viruses of potatoes and seed-potato production
U1  - 633.491 98 D30V 
PY  - 1987///
PB  - Wagingen
KW  - POTATOES - DISEASES AND PESTS
KW  - PLANT VIRUSES
KW  - VIRUS DISEASES OF PLANTS
ER  -