TY  - BOOK
AU  - Refatti, E.
TI  - Pear decline and moria
KW  - Pera
KW  - Enfermedades por virus
N1  - Sobretiro de: Technical communication. Commonwealth Bureau of Horticulture and Plantation Crops No. 30, Suplement No. 1: 108a - 108h, 1967
ER  -