@misc{indiciae59780a60fe9d,
  title = {New graphic methods for determining the depth and thickness of strata and the projection of dip},
  author = {Harold S. Palmer},
  year = {1919},
  doi = {10.3133/pp120g},
  url = {https://pubs.usgs.gov/publication/pp120G},
  note = {Source identifier: pp120G}
}