TY - GEN AU - Thompson, G N AU - Cooley, Paul A C2 - , National Institute of Standards and Technology, Gaithersburg, MD DA - 1947-01-01 05:01:00 DO - https://doi.org/10.6028/NBS.MP.178-2 LA - en PB - , National Institute of Standards and Technology, Gaithersburg, MD PY - 1947 TI - Supplement to national directory of commodity specifications/: ER -