@misc{indiciaefb64611bcc32,
  title = {Removal of ash from plankton samples concentrated by ignition},
  author = {K. N. Sachs},
  year = {1965},
  doi = {10.1016/0011-7471(65)91869-3},
  url = {https://pubs.usgs.gov/publication/70009987},
  note = {Source identifier: 70009987}
}