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1989年12月20日 01 开封市郊区辛庄甲型肝炎暴发流行成因及防治对策/张泽(开封市郊区卫生防疫站) 02 封丘县1960—1988年病毒性肝炎流行概况/晁南明等(封丘县卫生防疫站)
December 20, 1989 01 Kaifeng suburban Xin Zhuang hepatitis A outbreak causes and prevention and control measures / Zhang Ze (Kaifeng suburban health and epidemic prevention station) 02 Fengqiu County 1960-1988 Viral hepatitis epidemic profile / Chao Nanming et al Fengqiu County Health and Epidemic Prevention Station)