@misc{indiciaee9e6fbff8190,
  title = {Development of marine paleoecology},
  author = {Harry Stephen Ladd and G. Gunter},
  year = {1957},
  doi = {10.1130/mem67v2-p67},
  url = {https://pubs.usgs.gov/publication/70206839},
  note = {Source identifier: 70206839}
}