RT Journal Article SR Electronic T1 Sensitivity to ampicillin, penicillin, and tetracyline of gonococci in Rotterdam. JF The British Journal of Venereal Diseases JO Br J Vener Dis FD BMJ Publishing Group Ltd SP 202 OP 207 DO 10.1136/sti.50.3.202 VO 50 IS 3 A1 E Stolz A1 H G Zwart A1 M F Michel YR 1974 UL http://sti.bmj.com/content/50/3/202.abstract AB