RT Journal Article SR Electronic T1 Preliminary Agglutination Experiments with Treponema Pallidum. JF The British Journal of Venereal Diseases JO Br J Vener Dis FD BMJ Publishing Group Ltd SP 249 OP 253 DO 10.1136/sti.31.4.249 VO 31 IS 4 A1 Ehrmann, G. A1 Nielsen, H. Aa. YR 1955 UL http://sti.bmj.com/content/31/4/249.abstract AB