@misc{indiciaecfa7bed78455,
  title = {Geology and mineral resource potential map of the Graham Creek Roadless Area, Angelina and Jasper counties, Texas},
  author = {B. B. Houser and G. S. Ryan},
  year = {1983},
  doi = {10.3133/mf1552},
  url = {https://pubs.usgs.gov/publication/mf1552},
  note = {Source identifier: mf1552}
}