@misc{indiciae26939f2e467d,
  title = {Land use and land cover, 1970-72, Pittsburgh, Pennsylvania},
  author = {Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey},
  year = {1979},
  doi = {10.3133/l34},
  url = {https://pubs.usgs.gov/publication/l34},
  note = {Source identifier: l34}
}