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  - 1968
UR  - https://ntrs.nasa.gov/citations/19690014588
ID  - 19690014588
ER  -