@misc{indiciae57c77ecb5733,
  title = {Indexes of hydrologic data from selected coal-mining areas in northwestern Colorado},
  author = {N. G. Gaggiani},
  year = {1989},
  doi = {10.3133/ofr88347},
  url = {https://pubs.usgs.gov/publication/ofr88347},
  note = {Source identifier: ofr88347}
}