TY - JOUR AU - Frohnsdorff, G AU - Kaetzel, L C2 - Concrete International DA - 1999-12-01 LA - en PB - Concrete International PY - 1999 TI - Computerizing Concrete Technology Knowledge UR - https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=860745 ER -