@misc{indiciae2047149afe7e,
  title = {Protocol for analysis of volcanic ash samples for assessment of hazards from leachable elements},
  author = {C. Stewart and C. Horwell and Geoffrey S. Plumlee and Shane Cronin and P. Delmelle and P. Baxter and J. Calkins and David Damby and Suzette A. Morman and Clive Oppenheimer},
  year = {2013},
  url = {https://pubs.usgs.gov/publication/70189091},
  note = {Source identifier: 70189091}
}