@misc{76801, author = {Jeffrey Bullard}, title = {User's Guide to the Virtual Cement and Concrete Testing Laboratory Version 1.1}, year = {2003}, month = {2003-03-01}, publisher = {NIST Interagency/Internal Report (NISTIR), National Institute of Standards and Technology, Gaithersburg, MD}, url = {https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=860490}, language = {en}, }