@misc{indiciae3b1de90c3175,
  title = {Geologic map of the Harrison 1 degree x 2 degrees quadrangle, Missouri and Arkansas},
  author = {Mark A. Middendorf and K.C. Thomas and C.E. Robertson and J.W. Whitfield and E.E. Glick and W. V. Bush and B.R. Haley and J.D. McFarland},
  year = {1994},
  doi = {10.3133/ofr94430},
  url = {https://pubs.usgs.gov/publication/ofr94430},
  note = {Source identifier: ofr94430}
}