1. Deutsche med. Wchnschr., Leipzig, 1906, No. 22, p. 866.
2. “The Causes of Tuberculosis,” Camb. Univ. Press, 1917, p. 511.
3. The Causes of Tuberculosis, p. 505.
4. Appendix to Final Report of Royal Commission on Tuberculosis, 1911, vol. iv. p. 151.
5. and Appendix to Second Interim Report of Royal Commission on Tuberculosis, 1907, vol. iii.