@misc{indiciae006b7325bc6f,
  title = {Discrepancies between radar data and the lunar ephemeris.},
  author = {Pettengill, G. H. and Shapiro, I. I. and Smith, C. R. and Weinstein, F. S.},
  year = {1968},
  url = {https://ntrs.nasa.gov/citations/19680049280},
  note = {Source identifier: 19680049280}
}