@misc{indiciae3683e52ea25d,
  title = {Synoptic key to the phyla, classes, and orders of animals ; with particular reference to fresh-water and terrestrial forms of the moist temperate region in North America — Illustration, BHL page 6262557},
  year = {1923},
  url = {https://www.biodiversitylibrary.org/page/6262557},
  note = {Source identifier: page-6262557}
}