TY  - RPRT
TI  - A dynamic model of Venus's gravity field
AU  - Kiefer, W. S.
AU  - Richards, M. A.
AU  - Hager, B. H.
AU  - Bills, B. G.
PY  - 1986
UR  - https://ntrs.nasa.gov/citations/19860038147
ID  - 19860038147
ER  -