Descriptive and comparative osteology of the oldest fossil squirrel Protosciurus (Sciuridae: Rodentia) /
Emry, Robert J.
Descriptive and comparative osteology of the oldest fossil squirrel Protosciurus (Sciuridae: Rodentia) / Robert J. Emry and Richard W. Thorington, Jr. - City of Washington : Smithsonian Institution Press, 1982. - iv, 35 p. : ill. ; 26 cm. - Smithsonian contributions to paleobiology ; no. 47 .
Descriptive and comparative osteology of the oldest fossil squirrel Protosciurus (Sciuridae: Rodentia) / Robert J. Emry and Richard W. Thorington, Jr. - City of Washington : Smithsonian Institution Press, 1982. - iv, 35 p. : ill. ; 26 cm. - Smithsonian contributions to paleobiology ; no. 47 .