@misc{indiciae6f066fce0d3e,
  title = {Guidance system operations plan for manned CM earth orbital missions using program SKYLARK 1. Section 4: Operational modes},
  author = {Dunbar, J. C.},
  year = {1972},
  url = {https://ntrs.nasa.gov/citations/19720024991},
  note = {Source identifier: 19720024991}
}