TY - GEN AU - Elmer R Weaver C2 - , National Institute of Standards and Technology, Gaithersburg, MD DA - 1950-01-01 05:01:00 DO - https://doi.org/10.6028/NBS.CIRC.491 LA - en PB - , National Institute of Standards and Technology, Gaithersburg, MD PY - 1950 TI - Circular of the Bureau of Standards no. 491::control of odors ER -