000 00295 am a2200121 a 4500
100 1 _aBack, E.A.
245 1 _aPsocids annoying house pests
260 _aWashington
_c1939
300 _a1-4 p.
942 _2udc
_cB
440 _aU.S. Department of Agriculture. Leaflet No. 189
901 _aS49670
999 _c106291
_d106291