Journal Article
Chiba, Yasuo, Aiqiang Xu, LI Li, T Lei, Toshiro Takezaki, Akio Hagiwara, Tetsuo Yoneyama, Takashi Fujiwara, Minoru Hara, and Teiji Yamamoto.
"Poliomyelitis surveillance in Shandong province, China, 1990-92.." Bulletin of the World Health Organization 72, no. 6 (1994): 915-920.