@misc{indiciae611e538955ea,
  title = {Classification of wetlands of the United States},
  author = {Alexander C. Martin and Neil Hotchkiss and Francis M. Uhler and Warren S. Bourn},
  year = {1953},
  url = {https://pubs.usgs.gov/publication/ssrw20},
  note = {Source identifier: ssrw20}
}