@misc{indiciaeb91c9703eb49,
  title = {Chemical analyses of fruits, vegetables, and their associated soils from areas of commercial production in the conterminous United States},
  author = {Josephine G. Boerngen and Hansford Threlkeld Shacklette},
  year = {1980},
  doi = {10.3133/ofr8084},
  url = {https://pubs.usgs.gov/publication/ofr8084},
  note = {Source identifier: ofr8084}
}