@misc{indiciae0d97d15b312e,
  title = {The preparation of plant material and determination of weight percent ash},
  author = {T.R. Peacock},
  year = {1992},
  doi = {10.3133/ofr92345},
  url = {https://pubs.usgs.gov/publication/ofr92345},
  note = {Source identifier: ofr92345}
}