REFERENCES
- Fletcher, W. (1928). Recent work on Leptospirosis, Tsutsugamashi Disease and Tropical Typhus In the Federated Malay States. Trans. Roy. Soc. Trap. Med. and Hyg. Vol, 21, 265–282.
- Middleton, A. D. (1929). Leptospira ictero-baemorrbagiae in Oxford Rats. Jl. of Hygiene, 29, 219–226.
- Ruge, H. (1928). Neuere Literatur über Weilsche Krankheit und Siebentagefieber. Arch. f. Scbiffs.-u. Trop. Hyg. Vol, 32, 412–432.
- Zuelzer, M. (1925). Die Spirochäten. Prowazeks Handb. d. Patb. Prot. Vol, 11.