1. The book of bird life;Allen,1961
2. The Wren;Armstrong,1955
3. Nesting success of the Cactus Wren in relation to nest orientation;Austin;Condor,1974
4. Incubation and nest-building behavior of the Black-headed Gull;Beer;Behaviour,1966
5. The White-crowned Sparrows (Zonotrichia leucophrys) of the Pacific seaboard: Environment and annual cycle;Blanchard;Univ. Calif. Publ. in Zool,1941