@misc{indiciae72c12c7b508e,
  title = {Preliminary report as of July 23, 1943 on the high alumina clay deposit at Hobart Butte, Lane County, Oregon},
  author = {John S. Loofbourow},
  year = {1943},
  doi = {10.3133/ofr4545},
  url = {https://pubs.usgs.gov/publication/ofr4545},
  note = {Source identifier: ofr4545}
}