@misc{indiciae75f08caa5b6a,
  title = {Skylab 4 preliminary reference Earth Resources Experiment Package (EREP) pass planning document. Volume 1: Groundtracks},
  author = {Lunde, A. N.},
  year = {1971},
  url = {https://ntrs.nasa.gov/citations/19720007174},
  note = {Source identifier: 19720007174}
}