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2. Veis, G.: 1967, ?The Determination of the Radius of the Earth and Other Geodetic Parameters as Derived from Optical Satellite Data?, paper presented at the XIV General Assembly of the International Union of Geodesy and Geophysics, International Association of Geodesy.
3. Lundquist, C. A. and Veis, G.: 1966, Smithsonian Astrophysical Observatory Special Report No. 200, Vol. 1.
4. Gaposchkin, E.M.: 1969, ?Improved Values for the Tesseral Harmonics of the Geopotential and Station Coordinates?, presented at the XII COSPAR Meeting, Prague, May 1969, Smithsonian Institute Astrophysical Observatory.
5. Gaposchkin, E. M.: 1969, Provisional Geodetic Parameters, U.S. Gov't Memorandum.