@misc{indiciae23cce82b07fd,
  title = {Marine sand and gravel mining},
  author = {M.J. Cruickshank and H.D. Hess},
  year = {1978},
  doi = {10.3133/25293},
  url = {https://pubs.usgs.gov/publication/25293},
  note = {Source identifier: 25293}
}