@misc{indiciae60c137bd16c2,
  title = {Geologic and societal factors affecting the international oceanic transport of aggregate},
  author = {W. H. Langer},
  year = {1995},
  doi = {10.1007/bf02263378},
  url = {https://pubs.usgs.gov/publication/70018829},
  note = {Source identifier: 70018829}
}