TY  - RPRT
TI  - Performance characteristics of a "Ulok", model 87 BT, disposable, viscous type, synthetic fiber air filter 
AU  - Davis, Joseph C
AU  - Achenbach, Paul R
PY  - 1964
PB  - National Bureau of Standards
CY  - Gaithersburg, MD
SN  - NBS report ; 8522
DO  - 10.6028/NBS.RPT.8522
ER  -