@misc{indiciae93e48faf62c0, title = {Descriptive and comparative osteology of the oldest fossil squirrel Protosciurus (Rodentia: Sciuridae) / Smithsonian contributions to paleobiology — Illustration, Page 14}, year = {1982}, url = {https://www.biodiversitylibrary.org/page/58101778}, note = {Source identifier: page-58101778} }