TY - RPRT TI - Performance tests of a Fram throw-away type air filter : manufactured by Fram Aire Corporation Division of Fram Corporation Providence, Rhode Island AU - Coblentz, Carl W AU - Achenbach, Paul R PY - 1960 PB - National Bureau of Standards CY - Gaithersburg, MD SN - NBS RPT 6954 DO - 10.6028/NBS.RPT.6954 ER -