TY  - RPRT
TI  - User's guide to the virtual cement and concrete testing laboratory, version 1.1 
AU  - Bullard, Jeffrey W
PY  - 2003
PB  - National Institute of Standards and Technology
CY  - Gaithersburg, MD
SN  - NIST IR 6968
DO  - 10.6028/NIST.IR.6968
ER  -