@misc{indiciae2061e7cdd2bf,
  title = {Thermal Heliotrope - A passive sun-tracker},
  author = {Byxbee, R. C. and Lott, D. R.},
  year = {1970},
  url = {https://ntrs.nasa.gov/citations/19700012138},
  note = {Source identifier: 19700012138}
}