@misc{indiciae0c3e0a00e604,
  title = {Collection, preparation and testing of NIST hard rock mine waste reference material SRM 2780},
  author = {S. A. Wilson and Paul H. Briggs and Z. A. Brown and J.E. Taggart and R. J. Knight},
  year = {1999},
  doi = {10.3133/ofr99370},
  url = {https://pubs.usgs.gov/publication/ofr99370},
  note = {Source identifier: ofr99370}
}