@misc{indiciaea32645cfbddb,
  title = {Skylab: A chronology},
  author = {Newkirk, R. W. and Ertel, I. D. and Brooks, C. G.},
  year = {1977},
  url = {https://ntrs.nasa.gov/citations/19780017172},
  note = {Source identifier: 19780017172}
}