TY  - BOOK
AU  - Oppenfeld, H. Von.
TI  - Cost and effectiveness of different insect and disease control practices in New York apple orchards
CY  - Itaca, N. Y.
PB  -  Agricultural Experiment Station
KW  - Aspersión
KW  -  Efecto en árboles frutales  Insecticidas
ER  -