TY  - RPRT
TI  - A dynamical model of upper-atmospheric helium
AU  - Straus, J. M.
AU  - Creekmore, S. P.
AU  - Ching, B. K.
PY  - 1977
UR  - https://ntrs.nasa.gov/citations/19770054300
ID  - 19770054300
ER  -