@misc{indiciae1436773fe9d5,
  title = {Preliminary integrated geologic map databases for the United States: Central states: Montana, Wyoming, Colorado, New Mexico, North Dakota, South Dakota, Nebraska, Kansas, Oklahoma, Texas, Iowa, Missouri, Arkansas, and Louisiana},
  author = {Douglas B. Stoeser and Gregory N. Green and Laurie C. Morath and William D. Heran and Anna B. Wilson and David W. Moore and Bradley S. Van Gosen},
  year = {2005},
  doi = {10.3133/ofr20051351},
  url = {https://pubs.usgs.gov/publication/ofr20051351},
  note = {Source identifier: ofr20051351}
}