TY  - RPRT
TI  - NIST time and frequency bulletin no. 481 
AU  - Bennett, Gwen E
PY  - 1997
PB  - National Institute of Standards and Technology
CY  - Gaithersburg, MD
SN  - NIST IR 5057-12
DO  - 10.6028/NIST.IR.5057-12
ER  -