@misc{indiciaeef8aedeb02d5,
  title = {Distribution of silica resources in eastern United States},
  author = {Thomas Daniel Murphy},
  year = {1960},
  doi = {10.3133/b1072l},
  url = {https://pubs.usgs.gov/publication/b1072L},
  note = {Source identifier: b1072L}
}