TY - RPRT TI - Performance test of a Westinghouse "Precipitron" electrostatic air cleaner AU - Coblentz, Carl W AU - Achenbach, Paul R PY - 1959 PB - National Bureau of Standards CY - Gaithersburg, MD SN - NBS RPT 6498 DO - 10.6028/NBS.RPT.6498 ER -