1. Allen, R. W. (1913): Bacterial Diseases of Respiration and Vaccines in Their Treatment. Lewis, London.
2. Arnold, L.: Ostrum, M., and Singer, C. (1928): Auto-sterilizing Power of the Nasal Mucosa.Proc. Soc. Exp. Biol. and Med., 25:624.
3. Bloomfield, A. L. (1919): The Fate of Bacteria Introduced into the Upper Air Passages.Amer. Rev. Tuberc., 3:553.
4. Bloomfield, A. L., (1920): The Fate of Bacteria Introduced into the Upper Air Passages. II. B. coli and Staphylococcus albus.Bull. Johns Hopkins Hosp., 31:14–85.
5. Bloomfield, A. L. (1920): The Fate of Bacteria Introduced into the Upper Air Passages. V. Friedlaender Bacilli. Ibid., 31:203–206.