A simple introduction to gravity, describing what it is and giving some effects of this force.
What Is Gravity? (Rookie Read-About Science) (Ages 6+)
- 作者： Trumbauer, Lisa
- 出版社： Scholastic Library Pub
- 出版日期： 2004-08-01
- ISBN碼： 9780516258447
- 編號： gds20131125011954kuq
$ 175 元
原價 175
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$175