@misc{indiciae44ab6aa78824,
  title = {Identification of excess 40Ar by the 40Ar 39Ar, age spectrum technique},
  author = {M. A. Lanphere and G. Brent Dalrymple},
  year = {1976},
  doi = {10.1016/0012-821x(76)90052-2},
  url = {https://pubs.usgs.gov/publication/70011168},
  note = {Source identifier: 70011168}
}