@misc{indiciaeb06f4e69b521,
  title = {Composition of the sediment on the insular shelf and upper slope of southwestern and south-central Puerto Rico},
  author = {C. W. Holmes and L. E. Garrison},
  year = {1973},
  doi = {10.3133/ofr73116},
  url = {https://pubs.usgs.gov/publication/ofr73116},
  note = {Source identifier: ofr73116}
}