@misc{1163336, author = {Howard M Kanare and R Keith Kirby}, title = {Standard Reference Materials ::Portland cement chemical composition standards (blending, packaging, and testing)/}, year = {1988}, month = {1988-01-01 05:01:00}, publisher = {, National Institute of Standards and Technology, Gaithersburg, MD}, doi = {https://doi.org/10.6028/NBS.SP.260-110}, language = {en}, }