1901. The status of the Cedar Waxwing in California. Condor, 3(6):146-147, 1901.
1909. A new cowbird of the genus Molothrus. Univ. California Publ. Zoöl., 5:275-281, 6 figs. in text, 1909.
Griscom, L.
1934. The ornithology of Guerrero, Mexico. Mus. Comp. Zoöl. Bull. 75:367-422, 1934.
Hamilton, W. J., Jr.
1933. A late nesting waxwing in central New York. Auk, 50(2):114-115, 1933.
Hanna, W. C.
1931. Nesting of the Bohemian Waxwing in British Columbia. Condor, 33(6):253-254, 1 fig., 1931.
Heinroth, O.
1924. Die Vögel Mitteleuropas. Berlin, Huge Bermühler, 1:51-58, 1924.