@misc{indiciaede103fbcdef8,
  title = {Map showing potential source areas for non-metallic mineral resources, Morrison quadrangle, Jefferson County, Colorado},
  author = {G. R. Scott},
  year = {1972},
  doi = {10.3133/i790d},
  url = {https://pubs.usgs.gov/publication/i790D},
  note = {Source identifier: i790D}
}