RT Journal Article SR Electronic T1 Gonococcal penile ulcer. JF The British Journal of Venereal Diseases JO Br J Vener Dis FD BMJ Publishing Group Ltd SP 336 OP 337 DO 10.1136/sti.46.4.336 VO 46 IS 4 A1 S Haim A1 D Merzbach YR 1970 UL http://sti.bmj.com/content/46/4/336.abstract AB