Chapman, Frank M. (Frank Michler), 1864-1945.2005-10-062005-10-061891http://hdl.handle.net/2246/583p. 311-314 : ill. ; 24 cm.1126576 bytesapplication/pdfen-USQH1 .A4 vol.3, art.21, 1891Colaptes auratus -- Color.Colaptes auratus -- Variation.Birds -- Color -- United States.Birds -- Variation -- United States.On the color-pattern of the upper tail-coverts in Colaptes auratus. Bulletin of the AMNH ; v. 3, article 21.Color-pattern in Colaptes auratustext