TY - GEN AU - Clark, Stephen Nowland C2 - , National Institute of Standards and Technology, Gaithersburg, MD DA - 1990-01-01 05:01:00 DO - https://doi.org/10.6028/NIST.IR.4353 LA - en PB - , National Institute of Standards and Technology, Gaithersburg, MD PY - 1990 TI - NIST STEP working form programmer's reference: ER -