TY - GEN AU - Klieger, Paul AU - Snyder, Kenneth C2 - , National Institute of Standards and Technology, Gaithersburg, MD DA - 1993-01-01 05:01:00 DO - https://doi.org/10.6028/NIST.IR.5184 LA - en PB - , National Institute of Standards and Technology, Gaithersburg, MD PY - 1993 TI - Highway concrete (HWYCON) expert system user reference and enhancement guide: ER -