@misc{indiciae200bcf349c56,
  title = {Cryogenic helium 2 systems for space applications},
  author = {Urban, E. and Katz, L. and Hendricks, J. and Karr, G.},
  year = {1978},
  url = {https://ntrs.nasa.gov/citations/19790023151},
  note = {Source identifier: 19790023151}
}