@misc{1200331, author = {Kathryn Stephenson}, title = {NIST time and frequency bulletin - September:}, year = {2018}, month = {2018-09-01 04:09:00}, publisher = {, National Institute of Standards and Technology, Gaithersburg, MD}, doi = {https://doi.org/10.6028/NIST.IR.8205-09}, language = {en}, }