@misc{indiciae27cc06d4971e,
  title = {A technique for evaluating track condition using railcar vibrations},
  author = {Clevenson, S. A. and Ullman, K. B.},
  year = {1971},
  url = {https://ntrs.nasa.gov/citations/19710044652},
  note = {Source identifier: 19710044652}
}