TY  - RPRT
TI  - NIST time and frequency bulletin 
AU  - Lichtfuss, Karen Hansen
PY  - 2015
PB  - National Institute of Standards and Technology
CY  - Gaithersburg, MD
SN  - NIST IR 8044-12
DO  - 10.6028/NIST.IR.8044-12
ER  -