Allen, J. A. (Joel Asaph), 1838-1921.2005-10-062005-10-061907http://hdl.handle.net/2246/1937p. 467-481 ; 24 cm.Includes bibliographical references.1438923 bytesapplication/pdfen-USQH1 .A4 vol.23, art.22, 1907Baeolophus -- Variation.BaeolophusHybridization.Titmice -- Variation -- Texas.Titmice -- TexasParidae -- Variation -- Texas.Paridae -- TexasBirds -- Variation -- Texas.Birds -- Texastext