@misc{indiciaecbed5403b7ff,
  title = {Extraction of metals from raw clinoptilolite-rich rocks exposed to water in heavy-metal-polluted drainages},
  author = {George A. Desborough and David Frishman},
  year = {1995},
  doi = {10.3133/ofr9556},
  url = {https://pubs.usgs.gov/publication/ofr9556},
  note = {Source identifier: ofr9556}
}