TY  - BOOK
AU  - E.O. Essig
AU  -  Frieda Abernathy, 
TI  - Aphid genus periphyllus : A systematic, biological and ecological study
U1  - 632.752 
PY  - 1952///
CY  - Los Angeles
PB  - University of California Press
N1  - E.O. Essig & Frieda Abernathy: Aphid genus periphyllus : A systematic, biological and ecological study.  Los Angeles.  University of California Press, 1952.--(632.752ESS)
ER  -