RT Journal Article SR Electronic T1 Study of a passive haemagglutination test for gonorrhoea. JF The British Journal of Venereal Diseases JO Br J Vener Dis FD BMJ Publishing Group Ltd SP 508 OP 510 DO 10.1136/sti.49.6.508 VO 49 IS 6 A1 S Fletcher A1 R Miller A1 C S Nicol YR 1973 UL http://sti.bmj.com/content/49/6/508.abstract AB