@misc{indiciae7ff5ce4c7791,
  title = {Age of the Tordal, Norway pegmatite-A correction},
  author = {J. L. Kulp and R. Kologrivov and J. Engels and E. J. Catanzaro and H. Neumann and B. Nilssen},
  year = {1963},
  doi = {10.1016/0016-7037(63)90047-4},
  url = {https://pubs.usgs.gov/publication/70214095},
  note = {Source identifier: 70214095}
}