@misc{indiciaef8e696b67ba0,
  title = {Nature . . . an environmental yardstick},
  author = {William T. Pecora},
  year = {1976},
  doi = {10.3133/itr7221},
  url = {https://pubs.usgs.gov/publication/itr7221},
  note = {Source identifier: itr7221}
}