@misc{indiciae119b0dca86c0,
  title = {Rare-earth elements in Apollo 12 lunar materials},
  author = {Allen, R. O. and Anderson, M. R. and Haskin, L. A. and Helmke, P. A. and Korotev, R. L. and Zweifel, K. A.},
  year = {1971},
  url = {https://ntrs.nasa.gov/citations/19710062997},
  note = {Source identifier: 19710062997}
}