Szu, S. (1998) “Phase II trials of conjugates of <em>S.typhi</em> Vi and of <em>S.paratyphi</em> A O-Speciftc polysaccharide (O-SP) conjugates in Dong Thap province, Vietnam”, Medical Journal of Indonesia, 7(Supp1), p. 109. doi: 10.13181/mji.v7iSupp1.1052.