@misc{indiciaed2921e1a539f,
  title = {Thermal Heliotrope - A passive sun-tracker},
  author = {Byxbee, R. C. and Lott, D. R.},
  year = {1970},
  url = {https://ntrs.nasa.gov/citations/19700058015},
  note = {Source identifier: 19700058015}
}