TY  - BOOK
AU  - Peterson, Alvah
TI  - Some studies on the eggs of important apple plant lice
CY  - New Brunswick, N. J.
PB  -  Agricultural Experiment Stations
KW  - Aphis avenae  Aphis pomi  Aphis sorbi  Afididos  Manzana
KW  -  Plagas
ER  -