TY  - RPRT
TI  - Liquid-vapour surface sensors for liquid nitrogen and hydrogen
AU  - Siegwarth, J. D.
AU  - Voth, R. O.
AU  - Snyder, S. M.
PY  - 1992
UR  - https://ntrs.nasa.gov/citations/19920041228
ID  - 19920041228
ER  -