@misc{indiciae5cdff155373f,
  title = {Chemical element concentrations in four lichens on a transect entering Voyageurs National Park},
  author = {James P. Bennett and C. M. Wetmore},
  year = {1997},
  doi = {10.1016/s0098-8472(96)01039-8},
  url = {https://pubs.usgs.gov/publication/1004112},
  note = {Source identifier: 1004112}
}