@misc{indiciae825e481a404e,
  title = {Map showing free-air gravity anomalies off the western coast of Africa Senegal (south of 15° north latitude) to Sierra Leone},
  author = {D. W. Folger and B.J. Irwin and J.R. McCullough and G.R. Driscoll and C. F. Polloni},
  year = {1990},
  doi = {10.3133/mf2098d},
  url = {https://pubs.usgs.gov/publication/mf2098D},
  note = {Source identifier: mf2098D}
}