@misc{indiciaef4d5a0f45f08,
  title = {An active thermal compensator for closed-cycle helium refrigerators},
  author = {Jennings, D. E. and Hillman, J. J.},
  year = {1977},
  url = {https://ntrs.nasa.gov/citations/19770023328},
  note = {Source identifier: 19770023328}
}