@misc{indiciae343dd7fb3fc9,
  title = {Clinoptilolite-rich rocks in agricultural use for soil amendment and potential nitrogen-pollution mitigation},
  author = {G. A. Desborough},
  year = {1996},
  doi = {10.3133/ofr9665},
  url = {https://pubs.usgs.gov/publication/ofr9665},
  note = {Source identifier: ofr9665}
}