@misc{indiciae76c9cfd255ea,
  title = {Report on the activity of IGCP Project 98},
  author = {S.M. Cargill and A. L. Clark},
  year = {1978},
  doi = {10.1007/bf02461973},
  url = {https://pubs.usgs.gov/publication/70000731},
  note = {Source identifier: 70000731}
}