@misc{indiciae885d26743691,
  title = {Early indications of soil recovery from acidic deposition in U.S. red spruce forests},
  author = {Gregory B. Lawrence and Walter C. Shortle and Mark B. David and Kevin T. Smith and Richard A.F. Warby and Andrei G. Lapenis},
  year = {2012},
  doi = {10.2136/sssaj2011.0415},
  url = {https://pubs.usgs.gov/publication/70043701},
  note = {Source identifier: 70043701}
}