@misc{indiciae28292389e74c,
  title = {Heat operated cryogenic electrical generator},
  author = {Wang, T. G. and Saffren, M. M. and Elleman, D. D.},
  year = {1975},
  url = {https://ntrs.nasa.gov/citations/19750016765},
  note = {Source identifier: 19750016765}
}