REFERENCES
- Castellani. Lancet, May 19, 1906.
- Castellani and Chalmers. Manual of Tropical Medicine, 2nd edition, 1913.
- Chalmers and O'Farrell. Journ. Trop. Med. and Hyg., Nov. 1, 1913.
- Branch. British Medical Journal, 1907.
- Jackson. Philippine Journal of Science, 1908.
- Waters. Transactions Society of Tropical Medicine, 1909.