TY - RPRT TI - Performance tests of a Farr "Microloc" replaceable media air filter AU - Coblentz, Carl W AU - Achenbach, Paul R PY - 1960 PB - National Bureau of Standards CY - Gaithersburg, MD SN - NBS RPT 6625 DO - 10.6028/NBS.RPT.6625 ER -