@misc{indiciaef579039fafad,
  title = {Passive solar array orientation system /thermal heliotrope/ Final report, 23 Dec. 1968 - 23 Sep. 1969},
  author = {Byxbee, R. C. and Lott, D. R.},
  year = {1969},
  url = {https://ntrs.nasa.gov/citations/19700011163},
  note = {Source identifier: 19700011163}
}