@misc{indiciaeafbcae466375,
  title = {Changes in element contents of four lichens over 11 years in the Boundary Waters Canoe Area Wilderness, northern Minnesota},
  author = {James P. Bennett and C. M. Wetmore},
  year = {1999},
  doi = {10.1016/s0098-8472(98)00055-0},
  url = {https://pubs.usgs.gov/publication/1004110},
  note = {Source identifier: 1004110}
}