1. 1909 Mendel's principles of heredity. Cambridge University Press.
2. and 1905 Poultry, In Report to the Evolution Committee of the Royal Society. Report II, PP. 99-131.
3. 1898 The structure and classification of birds. Longmans, Green & Co., London, New York, and Bombay.
4. 1906 Inheritance in poultry. Publications of the Carnegie Institution of Washington, no 52.