TY - RPRT TI - Performance tests of a Farr replaceable media air filter, model HP-2 : manufactured by Farr Company Los Angeles, California AU - Coblentz, Carl W AU - Achenbach, Paul R PY - 1960 PB - National Bureau of Standards CY - Gaithersburg, MD SN - NBS RPT 6629 DO - 10.6028/NBS.RPT.6629 ER -