@misc{indiciaefd2a9088f6b7,
  title = {Topographic and structural conditions in areas of gravitational spreading of ridges in the Western United States},
  author = {D. J. Varnes and D. H. Hall-Radbruch and W. Z. Savage},
  year = {1989},
  doi = {10.3133/pp1496},
  url = {https://pubs.usgs.gov/publication/pp1496},
  note = {Source identifier: pp1496}
}