Untreated Syphilis in the Male Negro. Observations of Abnormalities Over 16 Years. Am J Syphilis, Gonorrhea Venereal Dis. 1950;34:201-213.Olansky, S., et al.: Untreated syphilis in the male Negro. X. Twenty years of clinical observa- tion of untreated syphilitic and presumably non...