@misc{indiciae1885c763815d,
  title = {Median-permeability contour maps of the J sandstone, Dakota Group, in the Denver Basin, Colorado, Nebraska, and Wyoming},
  author = {D.K. Higley and D. L. Gautier},
  year = {1986},
  doi = {10.3133/mf1837},
  url = {https://pubs.usgs.gov/publication/mf1837},
  note = {Source identifier: mf1837}
}