The distribution of the swallows of the genus Pygochelidon. American Museum novitates ; no. 30

Chapman, Frank M. (Frank Michler), 1864-1945.2005-10-062005-10-061922http://hdl.handle.net/2246/458815 p.: maps ; 24 cm.Includes bibliographical references.6845011 bytesapplication/pdfen-USQL1 .A436 no.30, 1922PygochelidonPygochelidon -- Geographical distribution.Swallows -- South America -- Geographical distribution.Swallows -- Central America -- Geographical distribution.Birds -- South AmericaBirds -- South America -- Geographical distribution.Birds -- Central AmericaBirds -- Central America -- Geographical distribution.The distribution of the swallows of the genus Pygochelidon. American Museum novitates ; no. 30Swallows of the genus Pygochelidontext