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Author

Youjing Zheng

7 books found

Cover of Jing ji xiao yi wen ti yan jiu

Jing ji xiao yi wen ti yan jiu

Youjing Zheng · First published 1990

Cover of 技术进步与经济效益

技术进步与经济效益

Jingwen Li, Youjing Zheng, Shouyi Zhang, 范木荣 · First published 1989

Cover of Ji shu jin bu yu xian dai qi ye fa zhan (Xin ji shu ge ming yu guan li xian dai hua cong shu)

Ji shu jin bu yu xian dai qi ye fa zhan (Xin ji shu ge ming yu guan li xian dai hua cong shu)

Youjing Zheng · First published 1987

Placeholder cover for Shi yong jia chu wai ke xue

Shi yong jia chu wai ke xue

Youjing Zheng, Zude Zhu · First published 1982

Cover of 陽春集箋

陽春集箋

Youjing Zheng, Yuqing Zheng · First published 1971

Placeholder cover for Pu tong hua xue ke tang yan shi shi yan

Pu tong hua xue ke tang yan shi shi yan

Youjing Zheng · First published 1958

Cover of Penicillin Production on Natural Media by Culture Q 176 and New Strains of Penicillium Chrysogenum

Penicillin Production on Natural Media by Culture Q 176 and New Strains of Penicillium Chrysogenum

Youjing Zheng · First published 1948