@misc{indiciaefd58043bccf7,
  title = {Paleozoic Gastropoda from the Moose River synclinorium, northern Maine},
  author = {A. J. Boucot and E. L. Yochelson},
  year = {1966},
  doi = {10.3133/pp503a},
  url = {https://pubs.usgs.gov/publication/pp503A},
  note = {Source identifier: pp503A}
}