@misc{indiciae9e26115bdd91,
  title = {Mapping U.S. continental shelves},
  author = {J.V. Gardner and Bradford Butman and L. A. Mayer and J.H. Clarke},
  year = {1998},
  url = {https://pubs.usgs.gov/publication/70197288},
  note = {Source identifier: 70197288}
}