TY  - BOOK
AU  - Posnette, A. F.
TI  - Virus diseases of apples and pears
T2  - Commonwealth Bureau of Horticulture and Plantation Crops. technical communication
U1  - 632.8 
PY  - 1963///
CY  - England
PB  - Commonwealth Agricultural Bureaux
KW  - Fitopatología
KW  - Fruta
KW  - Enfermedades por virus
KW  - Manzana
KW  - Enfermedades
KW  - Pera
ER  -