@article{188224,
      author = {Emry, Robert J. and Thorington, Richard W.},
      url = {http://library.usi.edu/record/188224},
      title = {Descriptive and comparative osteology of the oldest fossil  squirrel Protosciurus (Rodentia:Sciuridae) /},
      publisher = {Smithsonian Institution,},
      recid = {188224},
      pages = {iv, 35 p. :},
      address = {Washington :},
      year = {1982},
}