@misc{indiciaec390cfb8510e,
  title = {Total intensity aeromagnetic profiles over northwestern Puerto Rico},
  author = {James A. Pitkin and Bernard L. White},
  year = {1966},
  doi = {10.3133/ofr66105},
  url = {https://pubs.usgs.gov/publication/ofr66105},
  note = {Source identifier: ofr66105}
}