J. H.  Bowles, ?Early nesting of Allen Hummingbird at Santa Barbara?, Condor, p. 77, 1912.

F. N.  Bassett, ?The nuptial flight of the Allen Hummingbird?, Condor, vol. 23, p. 37, 1921.

E. C.  Aldrich, ?Nesting of the Allen Hummingbird?, Condor, vol. 47, pp. 137-148, 1945.

K. B.  Armitage, ?Territorial behavior in fall migrant Rufous Hummingibrds?, Condor, vol. 57, pp. 239-240, 1955.

E. C.  Aldrich, ?Pterlyography and molt of the Allen Hummingbird?, Condor, vol. 58, pp. 121-133, 1956.

G. T.  Austin, ?Interspecific territoriality of migrant calliope and resident broad-billed hummingbirds?, Condor, vol. 72, p. 234, 1970.

W. A.  Calder, ?Piracy of nesting materials from and by the Broad-tailed Hummingbird?, Condor, vol. 74, p. 485, 1972.