@misc{indiciaeceff406e9b67,
  title = {Transcontinental geophysical survey (35°-39° N) magnetic and bathymetric map from 63° to 74° W longitude},
  author = {Isidore Zietz and H. P. Stockard and J.R. Kirby},
  year = {1968},
  doi = {10.3133/i536},
  url = {https://pubs.usgs.gov/publication/i536},
  note = {Source identifier: i536}
}