@misc{indiciae8335b395bcf6,
  title = {Preliminary map showing the occurrence of siliceous rocks in central North Carolina derived from enhanced principal component Landsat images},
  author = {R. G. Schmidt and M.H. Koslow},
  year = {1986},
  doi = {10.3133/mf1817},
  url = {https://pubs.usgs.gov/publication/mf1817},
  note = {Source identifier: mf1817}
}