TY  - RPRT
TI  - Rubidium and cesium frequency standards status and performance on the GPS program
AU  - Bethke, H.
AU  - Ringer, D.
AU  - Vanmelle, M.
PY  - 1984
UR  - https://ntrs.nasa.gov/citations/19850020916
ID  - 19850020916
ER  -