@misc{indiciae52fe0b3e5bc3,
  title = {Distribution of rubidium, strontium, and zirconium in tuff from two deep coreholes at Yucca Mountain, Nevada},
  author = {Richard W. Spengler and Zell E. Peterman},
  year = {1991},
  url = {https://pubs.usgs.gov/publication/70016612},
  note = {Source identifier: 70016612}
}