@misc{indiciaec67b73c43e38,
  title = {Earth orbital operations supporting manned interplanetary missions},
  author = {Sherwood, Brent and Buddington, Patricia A. and Whittaker, William L.},
  year = {1989},
  url = {https://ntrs.nasa.gov/citations/19900056445},
  note = {Source identifier: 19900056445}
}