@misc{indiciae1bd21217d289,
  title = {Initial test results with a single-cylinder rhombic-drive Stirling engine},
  author = {Cairelli, J. E. and Thieme, L. G. and Walter, R. J.},
  year = {1978},
  url = {https://ntrs.nasa.gov/citations/19780023590},
  note = {Source identifier: 19780023590}
}