@misc{indiciae28d1ad0bda94,
  title = {The inorganic constituents of marine invertebrates},
  author = {F. W. Clarke and W. C. Wheeler},
  year = {1917},
  doi = {10.3133/pp102},
  url = {https://pubs.usgs.gov/publication/pp102},
  note = {Source identifier: pp102}
}