@misc{indiciae7ae3dcf9890b,
  title = {Landslides in the area of middle Bunter sandstone (Erdfalle im Gebiet des mittleren Baunsandsteins)},
  author = {Ernst Sobotha and Severine Britt},
  year = {1941},
  doi = {10.3133/ofr4923c},
  url = {https://pubs.usgs.gov/publication/ofr4923C},
  note = {Source identifier: ofr4923C}
}