@misc{indiciae21ce0d090a2d,
  title = {Revision of some of Girty's invertebrate fossils from the Fayetteville Shale (Mississippian) of Arkansas and Oklahoma},
  author = {Mackenzie Gordon and William J. Sando and John Pojeta and Ellis L. Yochelson and I. G. Sohn},
  year = {1969},
  doi = {10.3133/pp606},
  url = {https://pubs.usgs.gov/publication/pp606},
  note = {Source identifier: pp606}
}