Xia yu zhi qian
Subtitle: ke xue tong hua ji
By: Yang Nan zhu ; ["Shao nian ke xue" bian ji bu bian]
Edition: Di 1 ban
Series: Shao nian ke xue cong shu
Publisher: Shao nian er tong chu ban she; Xin hua shu dian Shanghai fa xing suo fa xing
Published: 1979
Place of publication: Shanghai
Language: chi
Number of pages: 88