@misc{1174891, author = {Walter G Leight}, title = {Proceedings of Conference on Standards and Trade:}, year = {1987}, month = {1987-01-01 05:01:00}, publisher = {, National Institute of Standards and Technology, Gaithersburg, MD}, doi = {https://doi.org/10.6028/NBS.IR.87-3573}, language = {en}, }