RT Journal Article SR Electronic T1 Current concepts of the morphology and biology of Treponema pallidum based on electron microscopy. JF The British Journal of Venereal Diseases JO Br J Vener Dis FD BMJ Publishing Group Ltd SP 315 OP 328 DO 10.1136/sti.47.5.315 VO 47 IS 5 A1 Ovcinnikov, N M A1 Delektorskij, V V YR 1971 UL http://sti.bmj.com/content/47/5/315.abstract AB