@misc{indiciae180e30d7cec3,
  title = {Geochemical and paleoenvironmental variations across the Cretaceous/Tertiary boundary at Braggs, Alabama},
  author = {J.C. Zachos and Michael A. Arthur and Walter E. Dean},
  year = {1989},
  doi = {10.1016/0031-0182(89)90168-5},
  url = {https://pubs.usgs.gov/publication/70207746},
  note = {Source identifier: 70207746}
}