@misc{1147541, author = {Gwen E Bennett}, title = {NIST time and frequency bulletin no. 474:}, year = {1997}, month = {1997-01-01 05:01:00}, publisher = {, National Institute of Standards and Technology, Gaithersburg, MD}, doi = {https://doi.org/10.6028/NIST.IR.5057-05}, language = {en}, }