@misc{77916,
  author = {Jeffrey Bullard},
  title = {The Virtual Cement and Concrete Testing Laboratory Version 3.0},
  year = {2003},
  month = {2003-01-01},
  publisher = {NIST Interagency/Internal Report (NISTIR), National Institute of Standards and Technology, Gaithersburg, MD},
  language = {en},
}