@misc{indiciae68035685c9df,
  title = {Acid deposition sensitivity map},
  author = {John D. Peper and Andrew E. Grosz and Thomas H. Kress and Thomas K. Collins and Gary B. Kappesser and Cindy M. Huber and James R. Webb},
  year = {1995},
  doi = {10.3133/ofr95810},
  url = {https://pubs.usgs.gov/publication/ofr95810},
  note = {Source identifier: ofr95810}
}