TY  - RPRT
TI  - Upper and Middle Atmospheric Density Modeling Requirements for Spacecraft Design and Operations
AU  - Davis, M. H.
AU  - Smith, R. E.
AU  - Johnson, D. L.
PY  - 1987
UR  - https://ntrs.nasa.gov/citations/19870011232
ID  - 19870011232
ER  -