D'ALESSANDRO, G A lipopolysaccharide antigen of the Treponema. [electronic resource] - Nature Apr 1958 - 991-2 p. digital Publication Type: Journal Article ISSN: 0028-0836 Standard No.: 10.1038/181991b0 doi Subjects--Topical Terms: AntigensLipopolysaccharidesPolysaccharidesTreponema