RT Journal Article SR Electronic T1 Letter: Ultrastructure of T. vaginalis. JF The British Journal of Venereal Diseases JO Br J Vener Dis FD BMJ Publishing Group Ltd SP 240 OP 241 DO 10.1136/sti.50.3.240 VO 50 IS 3 A1 J P Heath YR 1974 UL http://sti.bmj.com/content/50/3/240.abstract AB