TY  - RPRT
TI  - Improved photoionization mass spectrometer
AU  - Poshchenrieder, W. P.
AU  - Samson, J. A. R.
AU  - Warneck, P.
PY  - 1970
UR  - https://ntrs.nasa.gov/citations/19700000388
ID  - 19700000388
ER  -