TY  - RPRT
TI  - Gravity model comparison using Geos-1 long arc orbital solutions
AU  - Lerch, F. J.
AU  - Marsh, J. G.
AU  - Oneill, B.
PY  - 1967
UR  - https://ntrs.nasa.gov/citations/19680012125
ID  - 19680012125
ER  -