@misc{indiciaeab12c394c6ef,
  title = {Satellite Power Systems (SPS) concept definition study (Exhibit D). Volume 4, Part 2: Cost and programmatics appendix},
  author = {Hanley, G. M.},
  year = {1981},
  url = {https://ntrs.nasa.gov/citations/19810012963},
  note = {Source identifier: 19810012963}
}