@misc{indiciaea0a3e5ebacdf,
  title = {Sources and uses of fertilizers and other soil amendments for food production; an outline},
  author = {Hansford Threlkeld Shacklette and R. C. Severson},
  year = {1975},
  doi = {10.3133/ofr7523},
  url = {https://pubs.usgs.gov/publication/ofr7523},
  note = {Source identifier: ofr7523}
}