TY - RPRT TI - Performance test of a "Dustfoe" deep-bedisposable air filter, model B-2000 : manufactured by Mine Safety Appliances Company Pittsburgh, Pennsylvania AU - Davis, Joseph C AU - Achenbach, Paul R PY - 1963 PB - National Bureau of Standards CY - Gaithersburg, MD SN - NBS report ; 8115 DO - 10.6028/NBS.RPT.8115 ER -