@misc{indiciae373b41f67270,
  title = {Smithsonian Astrophysical Observatory laser tracking systems},
  author = {Pearlman, M. R. and Lanham, N. W. and Lehr, C. G. and Wohn, J.},
  year = {1977},
  url = {https://ntrs.nasa.gov/citations/19770051278},
  note = {Source identifier: 19770051278}
}