TY  - GEN
AU  - Petty, Eyvon M
C2  - , National Institute of Standards and Technology, Gaithersburg, MD
DA  - 2011-01-01 05:01:00
DO  - https://doi.org/10.6028/NIST.IR.6661-07
LA  - en
PB  - , National Institute of Standards and Technology, Gaithersburg, MD
PY  - 2011
TI  - NIST time and frequency bulletin, no. 643:
ER  -