@misc{1203521, author = {Eyvon M Petty}, title = {NIST time and frequency bulletin, no. 544:}, year = {2003}, month = {2003-01-01 05:01:00}, publisher = {, National Institute of Standards and Technology, Gaithersburg, MD}, doi = {https://doi.org/10.6028/NIST.IR.6629-04}, language = {en}, }