@misc{indiciaec56cdeedfaf1,
  title = {Plant histology as an aid in squirrel food-habit studies},
  author = {L. L. Baumgartner and A. C. Martin},
  year = {1939},
  doi = {10.2307/3796113},
  url = {https://pubs.usgs.gov/publication/5220804},
  note = {Source identifier: 5220804}
}