Chapman, Frank M. (Frank Michler), 1864-1945.2005-10-062005-10-061923http://hdl.handle.net/2246/1855p. 243-278, [4] leaves of plates : ill., maps ; 24 cm.Includes bibliographical references.9234643 bytesapplication/pdfen-USQH1 .A4 vol.48, art.9, 1923Buarremon -- Variation.Buarremon -- Geographical distribution.Birds -- Variation -- Latin America.Birds -- Latin America -- Geographical distribution.Animal mutation.text