TY - GEN AU - Henry E Robinson AU - Thomas W Watson C2 - , National Institute of Standards and Technology, Gaithersburg, MD DA - 1953-01-01 05:01:00 DO - https://doi.org/10.6028/NBS.RPT.2846 LA - en PB - , National Institute of Standards and Technology, Gaithersburg, MD PY - 1953 TI - Performance tests of cleanable impingement-type air filters (type 44G): ER -