NASA NTRS · 19680049280
Discrepancies between radar data and the lunar ephemeris.
Abstract
Eckert-Brown lunar ephemeris predictions discrepancies with radar data of radial velocities
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Pettengill, G. H., Shapiro, I. I., Smith, C. R., Weinstein, F. S.. 1968-05-24. Discrepancies between radar data and the lunar ephemeris.. https://ntrs.nasa.gov/citations/19680049280
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