TY - RPRT TI - Performance tests of two deep-bed high efficiency air filters : manufactured by Continental Air Filters, Inc. Louisville, Kentucky AU - Davis, Joseph C AU - Hunt, Charles M PY - 1965 PB - National Bureau of Standards CY - Gaithersburg, MD SN - NBS report ; 8673 DO - 10.6028/NBS.RPT.8673 ER -