@misc{indiciae9f6206a75835,
  title = {Preliminary structure contour map of the Colorado plains},
  author = {E.A. Finley and C. E. Dobbin and E.E. Richardson},
  year = {1955},
  doi = {10.3133/om176},
  url = {https://pubs.usgs.gov/publication/om176},
  note = {Source identifier: om176}
}