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Sam Carbaugh
Buku oleh Sam Carbaugh
The Civil War: The Struggle that Divided America Timekeeping: Explore the History and Science of Telling Time with 15 Projects Penilaian: 0 dari 5 bintang0 penilaianDiscover the Desert: The Driest Place on Earth Penilaian: 0 dari 5 bintang0 penilaianRobotics: Discover the Science and Technology of the Future with 20 Projects Penilaian: 0 dari 5 bintang0 penilaian