@misc{indiciaeec1749fc54a1,
  title = {U.S. Geological Survey Library classification system},
  author = {R. Scott Sasscer},
  year = {1992},
  doi = {10.3133/b2010\_1992},
  url = {https://pubs.usgs.gov/publication/b2010\_1992},
  note = {Source identifier: b2010\_1992}
}