TY  - RPRT
TI  - NIST time and frequency services 
AU  - Beehler, Roger E
AU  - Beehler, Roger E
AU  - Lombardi, Michael A
PY  - 1991
PB  - National Institute of Standards and Technology
CY  - Gaithersburg, MD
SN  - NIST SP 432e1991
DO  - 10.6028/NIST.SP.432e1991
ER  -