TY  - RPRT
TI  - Vacuum pumping system for spaceborne passive hydrogen masers
AU  - Wolf, S. A.
AU  - Gubser, D. U.
AU  - Jones, L. D.
PY  - 1981
UR  - https://ntrs.nasa.gov/citations/19810018955
ID  - 19810018955
ER  -