@misc{indiciae7ba86e7f6085,
  title = {Einstein observations of three classical Cepheids},
  author = {Bohm-Vitense, E. and Parsons, S. B.},
  year = {1983},
  url = {https://ntrs.nasa.gov/citations/19830044496},
  note = {Source identifier: 19830044496}
}