Allen, J. A. (Joel Asaph), 1838-1921.2005-10-062005-10-061904http://hdl.handle.net/2246/669p. 135-138 : ill. ; 24 cm.Includes bibliographical references.462069 bytesapplication/pdfen-USQH1 .A4 vol.20, art.9, 1904Rodents -- Anatomy.Ear, External.Skull -- Anatomy.The external ear bone in certain rodents. Bulletin of the AMNH ; v. 20, article 9.text