@misc{indiciae365167b35d23,
  title = {USGS rock standards; III, Manganese-nodule reference samples USGS-Nod-A-1 and USGS-Nod-P-1},
  author = {F.J. Flanagan and David Gottfried},
  year = {1980},
  doi = {10.3133/pp1155},
  url = {https://pubs.usgs.gov/publication/pp1155},
  note = {Source identifier: pp1155}
}