@misc{indiciaeda42b6d0e72b,
  title = {Deflection resistance indicator},
  author = {Massey, H. S. and Pontious, H. L. and Zinsley, W. M.},
  year = {1972},
  url = {https://ntrs.nasa.gov/citations/19720000400},
  note = {Source identifier: 19720000400}
}