Xin zhuan li fa si fa jie shi jing jie
by Jianming Cao, Zhipei Jiang, Xiaobai Yu
Patent laws and legislationChinaChina. Zhuan li fa (1992)Patent laws and legislation -- China
3, 2, 274 p. ; 21 cm
Writing a summary for young readers…
For young readers
Book data: Open Library