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  - Berkey and Los- Angeles
PB  - University Of Califonia Press
N1  - E.O. Essig & Frieda Abernathy: Aphid genus periphyllus : A systematic, biological and ecological study.  Berkey and Los- Angeles.  University Of Califonia Press, 1952.--(632.752ESS)
ER  -