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2. Aoki, S.: 1969,Astron. J. 74, 284?91.
3. Dicke, R. H.: 1966, in B. G. Marsden and A. G. W. Cameron (eds.),The Earth-Moon System, Plenum Press, New York, pp. 98?164.
4. Duncombe, R. L. and Clemence, G. M.: 1958,Astron. J. 63, 456?9.
5. Explanatory Supplement to the Astronomical Ephemeris and the American Ephemeris and Nautical Almanac, Her Majesty's Stationery Office, London, 1961.