@misc{indiciae5cd3853180b1,
  title = {Transcontinental geophysical survey (35°-39° N) magnetic and bathymetric map from 74° to 87° W longitude},
  author = {Isidore Zietz and J.R. Kirby and H. P. Stockard},
  year = {1968},
  doi = {10.3133/i535a},
  url = {https://pubs.usgs.gov/publication/i535A},
  note = {Source identifier: i535A}
}