TY - GEN AU - Frances C Bell AU - Harold F Wollin C2 - , National Institute of Standards and Technology, Gaithersburg, MD DA - 1971-01-01 05:01:00 DO - https://doi.org/10.6028/NBS.SP.342 LA - en PB - , National Institute of Standards and Technology, Gaithersburg, MD PY - 1971 TI - Report of the 55th national conference on weights and measures 1970: ER -