TY - RPRT TI - Computerized integrated knowledge based system for high-performance concrete: an overview AU - Clifton, James R AU - Bentz, Dale P AU - Kaetzel, Lawrence J PY - 1997 PB - National Institute of Standards and Technology CY - Gaithersburg, MD SN - NIST IR 5947 DO - 10.6028/NIST.IR.5947 ER -