@misc{indiciaebad4e94035d9,
  title = {True vertical laser},
  author = {Billman, K. W. and Leonard, E. T. and Yaffee, M. A.},
  year = {1971},
  url = {https://ntrs.nasa.gov/citations/19710038509},
  note = {Source identifier: 19710038509}
}