@misc{indiciae833ff74208d4,
  title = {Ferricrete, manganocrete, and bog iron occurrences with selected sedge bogs and active iron bogs and springs in the upper Animas River watershed, San Juan County, Colorado},
  author = {Douglas B. Yager and Stan E. Church and Philip L. Verplanck and Laurie Wirt},
  year = {2003},
  doi = {10.3133/mf2406},
  url = {https://pubs.usgs.gov/publication/mf2406},
  note = {Source identifier: mf2406}
}