TY  - RPRT
TI  - NIST time and frequency bulletin no. 507 
AU  - Bennett, Gwen E
PY  - 2000
PB  - National Institute of Standards and Technology
CY  - Gaithersburg, MD
SN  - NIST IR 5091-02
DO  - 10.6028/NIST.IR.5091-02
ER  -