@misc{indiciae5045f677d5fb,
  title = {A photogeologic method for determining the direction of horizontal dilation from patterns of en echelon fracturing},
  author = {Wendell A. Duffield and K. Nakamura},
  year = {1973},
  url = {https://pubs.usgs.gov/publication/70160727},
  note = {Source identifier: 70160727}
}