@misc{indiciae77f62bdbfcdf,
  title = {Structural risk assessment and aircraft fleet maintenance},
  author = {Smith, Herb, Jr. and Saff, C. R. and Christian, Tom F.},
  year = {1990},
  url = {https://ntrs.nasa.gov/citations/19910001008},
  note = {Source identifier: 19910001008}
}