@misc{indiciae8e57249a6047,
  title = {Societal value of geologic maps},
  author = {Richard L. Bernknopf and D.S. Brookshire and D. R. Soller and M.J. McKee and J. F. Sutter and J. C. Matti and R. H. Campbell},
  year = {1993},
  doi = {10.3133/cir1111},
  url = {https://pubs.usgs.gov/publication/cir1111},
  note = {Source identifier: cir1111}
}