@misc{indiciae54f98f4e1b0e,
  title = {Geology of the North and South McCallum anticlines, Jackson County, Colorado, with special reference to petroleum and carbon dioxide},
  author = {John Charles Miller},
  year = {1934},
  doi = {10.3133/cir5},
  url = {https://pubs.usgs.gov/publication/cir5},
  note = {Source identifier: cir5}
}