Poliomyelitis surveillance in Shandong Province, China, 1990-92.
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Citation
Chiba, Y., Xu, A., Li, L., Lei, T., Takezaki, T. et al. (1994). Poliomyelitis surveillance in Shandong Province, China, 1990-92.. Bulletin of the World Health Organization, 72 (6), 915 - 920. World Health Organization. https://iris.who.int/handle/10665/264060