@misc{indiciae80ff1c73c427,
  title = {U-Pb isotope systematics and apparent ages of uranium ores, Ambrosia Lake and Smith Lake districts, Grants mineral belt, New Mexico},
  author = {K.R. Ludwig and K. R. Simmons and J.D. Webster},
  year = {1984},
  doi = {10.2113/gsecongeo.79.2.322},
  url = {https://pubs.usgs.gov/publication/70014077},
  note = {Source identifier: 70014077}
}