@misc{indiciaed28251cc620f,
  title = {Geologic map of the Margerum bauxite district, Colbert County, Alabama},
  author = {H. R. Bergquist},
  year = {1943},
  doi = {10.3133/ofr4333},
  url = {https://pubs.usgs.gov/publication/ofr4333},
  note = {Source identifier: ofr4333}
}