@misc{indiciae21cf9cbc59b9,
  title = {Observed decrease in the periods of pulsar PSR 0833-45.},
  author = {Downs, G. S. and Reichley, P. E.},
  year = {1969},
  url = {https://ntrs.nasa.gov/citations/19690047889},
  note = {Source identifier: 19690047889}
}