@misc{indiciaefaa32eee0e91,
  title = {Geologic, geochemical, and geophysical maps of the Rock Pile Mountain Wilderness study area, Madison County, Missouri},
  author = {W. P. Pratt and R. L. Erickson},
  year = {1982},
  doi = {10.3133/mf1339a},
  url = {https://pubs.usgs.gov/publication/mf1339A},
  note = {Source identifier: mf1339A}
}