TY - GEN AU - Thomas W Watson C2 - , National Institute of Standards and Technology, Gaithersburg, MD DA - 1956-01-01 05:01:00 DO - https://doi.org/10.6028/NBS.RPT.4945 LA - en PB - , National Institute of Standards and Technology, Gaithersburg, MD PY - 1956 TI - Performance tests of an Air-Maze Automaze automatic air filter model no. 3 - 9: ER -