TY  - BOOK
AU  - DE BOKX, J.A
TI  - Viruses of potatoes and seed-potato production
U1  - 635.21 D30V 
PY  - 1972///
PB  - The Netherland
KW  - SEED POTATOES -- DISEASES & PESTS
KW  - POTATOES -- DISEASES & PESTS
ER  -