TY  - BOOK
AU  - Yothers, M. A
AU  - Allen, Paul B.
TI  - Observations on the biology and control of the treehopper Heliria praealta (Fowler) in orchards of the pacific north west
CY  - Washington
PB  -  Department of Agriculture
KW  - Heliria  Membracidae  Control de plagas
ER  -