@misc{indiciaece86b812af91,
  title = {A method and fortran program for quantitative sampling in paleontology},
  author = {J.C. Tipper},
  year = {1976},
  doi = {10.1016/0098-3004(76)90007-8},
  url = {https://pubs.usgs.gov/publication/70010338},
  note = {Source identifier: 70010338}
}