@misc{indiciae5556977602d2,
  title = {Satellite Power Systems (SPS) concept definition study (Exhibit D). Volume 6, part 1: Cost and Programmatics},
  author = {Hanley, G. M.},
  year = {1981},
  url = {https://ntrs.nasa.gov/citations/19810012008},
  note = {Source identifier: 19810012008}
}