1. Asin, J.: Chancroid. Amer. J. Syph. 36, 483 (1952).
2. Lossino, E. H., and R. H. Allen: Venereal diseases in Canada. Brit. J. vener. Dis. 32, 150 (1956).
3. Rauschkolb, J. E.: Circumcision in treatment of chancroidal lesions of male genitalia. Arch. Derm. Syph. (Chicago) 39, 319 (1939).
4. Sullivan, M.: Chancroid. Amer. J. Syph. 24, 482 (1940).
5. Tottie, M.: Venereal disease problem in Sweden today. Brit. J. vener. Dis. 32, 157 (1956).