TY  - RPRT
TI  - A thermosphere composition measurement using a quadrupole mass spectrometer with a side energy focussing quasi-open ion source
AU  - Niemann, H. B.
AU  - Spencer, N. W.
AU  - Schmitt, G. A.
PY  - 1971
UR  - https://ntrs.nasa.gov/citations/19720003678
ID  - 19720003678
ER  -