TY - GEN AU - Hecht, Herbert C2 - , National Institute of Standards and Technology, Gaithersburg, MD DA - 1982-01-01 05:01:00 DO - https://doi.org/10.6028/NBS.SP.500-91 LA - en PB - , National Institute of Standards and Technology, Gaithersburg, MD PY - 1982 TI - Introduction of software tools: ER -