Ri he ye
By: zuo zhe Ye Shuhua ; hui tu Zhang Jun.
Contributors: Zhang, Jun.
Edition: Chu ban
Series: Er tong ke xue xiao bai ke
Publisher: Xin ya wen hua shi ye you xian gong si
Published: 2001
Place of publication: Xianggang
Language: chi
Number of pages: 34
Subjects: Science.