TY  - RPRT
TI  - Characterization of clocks and oscillators 
AU  - Allan, D W
AU  - Howe, David A
AU  - Walls, F L
AU  - Sullivan, D B
PY  - 1990
PB  - National Bureau of Standards
CY  - Gaithersburg, MD
SN  - NBS TN 1337
DO  - 10.6028/NIST.TN.1337
ER  -