1. Mass and dynamical oblateness of Venus;Anderson;Bull. Am. Astron. Soc.,1969
2. The excitation of atmospheric oscillations;Butler,1963
3. The Gravity Field of the Earth;Caputo,1967
4. Dyce, R., Campbell, D., and Jurgens, R. (1969). Private communication.
5. Radar astronomy;Eshleman;Science,1967