@misc{indiciae15ee79d4c54b,
  title = {Principal kinds of soils: orders, suborders, and great groups},
  author = {United States Soil Conservation Service},
  year = {1987},
  doi = {10.3133/32598},
  url = {https://pubs.usgs.gov/publication/32598},
  note = {Source identifier: 32598}
}