@misc{indiciae439578d98792,
  title = {A cotangent ruler for simplifying the graphic solution of problems in structural geology},
  author = {Walter S. White},
  year = {1946},
  doi = {10.2113/gsecongeo.41.5.539},
  url = {https://pubs.usgs.gov/publication/70214513},
  note = {Source identifier: 70214513}
}