@misc{indiciae30bf3926cbda,
  title = {Energy efficient engine: Preliminary design and integration studies},
  author = {Johnston, R. P. and Hirschkron, R. and Koch, C. C. and Neitzel, R. E. and Vinson, P. W.},
  year = {1978},
  url = {https://ntrs.nasa.gov/citations/19780023165},
  note = {Source identifier: 19780023165}
}