@misc{indiciae09e8118eb677,
  title = {Flight inspection data and crack initiation times},
  author = {Johnson, W. S. and Heller, R. A. and Yang, J. N.},
  year = {1977},
  url = {https://ntrs.nasa.gov/citations/19770067614},
  note = {Source identifier: 19770067614}
}