1. Agneta, J. O., and Molina, E. B. (1955). Rev. argent. Dermatosif:, 39, 29.
2. Aitken, R. B. (1947). J. vener. Dis. Inform., 28, 224.
3. Alechinsky, A. (1949). Arch. belges Derm., 5, 100.
4. Alexander, L. J., and Schoch, A. G. (1949). Arch. Derm.
5. Syph. (Chicago), 59, 1. and Mantooth, W. B. (1949). Amer. J. Syph., 33, 429.,___,___ --(1950). Ibid., 34, 420.