TY - RPRT TI - Performance tests of two throw-away type "Dust-Stop" air filters : manufactured by Owens-Corning Fiberglas Corporation Toledo, Ohio AU - Coblentz, Carl W AU - Achenbach, Paul R PY - 1960 PB - National Bureau of Standards CY - Gaithersburg, MD SN - NBS RPT 6692 DO - 10.6028/NBS.RPT.6692 ER -