@misc{indiciaec14515c9282d,
  title = {Material-properties analyzers using superconducting resonators},
  author = {Hartwig, W. H. and Hinds, J. J.},
  year = {1971},
  url = {https://ntrs.nasa.gov/citations/19710039463},
  note = {Source identifier: 19710039463}
}