1. Pterylography and molt of the Allen Hummingbird;Aldrich;Condor,1956
2. The anatomy and systematic position of the Antpipits Conopophaga and Corythopis;Ames;Peabody Mus. Postilla.,1968
3. Number of contour feathers of Cygnus and Xanthocephalus;Ammann;Auk,1937
4. Nomina anatomica avium: An annotated anatomical dictionary of birds;Baumel,1979
5. Ectoparasites of birds: A brief review;Beer,1970