Zheng Tan
Zheng Tan (鄭覃) (died 842), formally the Duke of Yingyang (滎陽公), was a Chinese historian and politician during the Tang dynasty, serving as a chancellor during the reign of Emperor Wenzong. He was viewed as a Li Faction leader in the Niu-Li Factional Struggles. Provided by Wikipedia-
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2Zheng feng wen jian : di yi fu ce整風文件 第一附冊 /by Tan, Zheng
Published 1944[China] : Huai nan ri bao she, 1944.12 p.