@misc{1131411, author = {Jeffrey W. Bullard}, title = {Virtual Cement and Concrete Testing Laboratory : version 9.5 user guide:}, year = {2014}, month = {2014-05-01 04:05:00}, publisher = {, National Institute of Standards and Technology, Gaithersburg, MD}, doi = {https://doi.org/10.6028/NIST.SP.1173}, language = {en}, }