E.O. Essig

Aphid genus periphyllus : A systematic, biological and ecological study - Berkey and Los- Angeles University Of Califonia Press 1952 - 166p

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)


ENGLISH

632.752 / ESS