TY  - RPRT
TI  - Gradiometry coexperiments to the gravity probe B and step missions
AU  - Tapley, M.
AU  - Breakwell, J.
AU  - Everitt, C. W. F.
AU  - Vanpatten, R.
AU  - Worden, P.
PY  - 1990
UR  - https://ntrs.nasa.gov/citations/19910004475
ID  - 19910004475
ER  -