RT Journal Article SR Electronic T1 Is gonorrhoea a good index of changed heterosexual behavior? JF Genitourinary Medicine JO Genitourin Med FD BMJ Publishing Group Ltd SP 135 DO 10.1136/sti.64.2.135 VO 64 IS 2 A1 J C Clay A1 A R Manuel A1 M Veeravahu YR 1988 UL http://sti.bmj.com/content/64/2/135.1.abstract AB