@misc{indiciaeb3229c96612d,
  title = {Preliminary Gulf Coast Coalbed Methane Exploration Maps: Depth to Wilcox, Apparent Wilcox Thickness and Vitrinite Reflectance},
  author = {Charles E. Barker and Laura R. Biewick and Peter D. Warwick and John R. SanFilipo},
  year = {2000},
  doi = {10.3133/ofr2000113},
  url = {https://pubs.usgs.gov/publication/ofr2000113},
  note = {Source identifier: ofr2000113}
}