1. Bates , Henry W. 1921 The naturalist on the Amazon. Everyman Ed.
2. Birds of the Belgian Congo;Chapin;Bull. Amer. Mus. Nat. Hist.,1932
3. La manifestacion de localismo en los Furnariidae;Davis;El Hornero,1940
4. The relation of abundance to territorialism in tropical birds;Davis;Bird- Banding,1941
5. The phylogeny of social nesting habits in the Crotophaginae;Davis;Quart. Rev. Bioi.,1942