Zhongguo nong xue shi :
(chu gao) /
Zhongguo nong ye ke xue yuan Zhongguo nong ye yi chan yan jiu shi, Nanjing nong xue yuan Zhongguo nong ye yi chan yan jiu shi bian zhu.

中國農學史 : (初稿)

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Limited (search only)   v.1 University of Michigan
Limited (search only)   v.2 University of Michigan