TY - RPRT TI - Guide to using HYDRA3D: a three-dimensional digital-image-based cement microstructural model AU - Bentz, Dale P AU - Garboczi, Edward J PY - 1992 PB - National Institute of Standards and Technology CY - Gaithersburg, MD SN - NIST IR 4746 DO - 10.6028/NIST.IR.4746 ER -