Gravitas : berbagai percobaan menakjubkan yang dapat dijasikan proyek pameran sains
Judul asli: Gravitas, mind-boggling experiments you can turn into sciense fair project.
| Main Author: | Vancleave, Janice |
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| Language: | Indonesian |
| Published: |
Pustaka Utama Grafiti
1997
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| Subjects: |