@misc{indiciae726122f07d7f,
  title = {High temperature solar photon engines},
  author = {Hertzberg, A. and Decher, R. and Mattick, A. T. and Lau, C. V.},
  year = {1978},
  url = {https://ntrs.nasa.gov/citations/19780061227},
  note = {Source identifier: 19780061227}
}