@misc{indiciaeaab1e31cf3ae,
  title = {Oxalic acid-soluble iron and manganese oxides in the Flathead Sandstone, Choteau quadrangle, Montana— A sample medium for mineral exploration},
  author = {R. W. Leinz and James W. Whipple},
  year = {1981},
  doi = {10.3133/ofr81475},
  url = {https://pubs.usgs.gov/publication/ofr81475},
  note = {Source identifier: ofr81475}
}