Partial bibliography
• A Revision of the bird family Dicruridae. N.Y., 1949. • "Systematic notes on Palearctic birds". N.Y. 1956 (American Museum of Natural History, American Museum Novitates) • A generic revision of Fly-catchers of the tribe Muscicapini. N.Y., 1953. • "Notes on some Ploceidae from Western Asia"; "Notes on some Asiatic Finches"; "Notes on the bird genus Oenanthe in Persia, Afghanistan, and India;" and several other articles all published in the American Museum Novitates. N.Y., 1949–1952. • "A generic revision of Flycatchers of the tribe Muscicapini". N.Y., 1953. pp.27 figs & 7 tables. Wrapp. Bulletin American Museum of Natural History – Vol. 100: Art. 4. • The Birds of the Palearctic Fauna: a Systematic Reference (2 Vols. )1959 • Classification of the Ovenbirds (Furnariidae). London, 1971. • Tibet and its birds. 1972 ==References==