@misc{indiciaec64081105520,
  title = {Contributions to economic geology, 1920, Part I, Metals and nonmetals except fuels--The potash deposits of Alsace},
  author = {H. S. Gale},
  year = {1921},
  doi = {10.3133/b715b},
  url = {https://pubs.usgs.gov/publication/b715B},
  note = {Source identifier: b715B}
}