@misc{1200596, author = {Petrina C. Potts}, title = {NIST Time and Frequency Bulletin:}, year = {2014}, month = {2014-04-01 04:04:00}, publisher = {, National Institute of Standards and Technology, Gaithersburg, MD}, doi = {https://doi.org/10.6028/NIST.IR.7980-03}, language = {en}, }