@misc{indiciae318b89782920,
  title = {Method for determining the age of igneous rocks using the accessory minerals},
  author = {E.S. Larsen and N.B. Keevil and C. Harrison},
  year = {1952},
  doi = {10.1130/0016-7606(1952)63[1045:mfdtao]2.0.co;2},
  url = {https://pubs.usgs.gov/publication/70221616},
  note = {Source identifier: 70221616}
}