TY  - BOOK
AU  - Back,E.A.
TI  - Psocids, annoying house pests ..
T2  - U.S. Dept. of agriculture. Leaflet
AV  - QL513.P9 B28
PY  - 1939///]
CY  - [Washington
PB  - U.S. Govt. Print. Off.
KW  - Psocidae
N1  - "By E.A. Back."--p. 2; Contribution from Bureau of entomology and plant quarantine
ER  -