@misc{1199061, author = {Robert G Mathey and James R Clifton}, title = {Guide specifications and reference specification system:}, year = {1989}, month = {1989-01-01 05:01:00}, publisher = {, National Institute of Standards and Technology, Gaithersburg, MD}, doi = {https://doi.org/10.6028/NIST.IR.89-4094}, language = {en}, }