Period photographs as well as pages from Bell's original notebooks help paint a vivid portrait of the man who -- from his first invention at age 11 (a tool to clean husks from wheat kernels) to his patent on hydrofoil improvements 64 years later -- was always inventing.
發表於2025-01-09
Always Inventing 2025 pdf epub mobi 電子書 下載
圖書標籤:
Always Inventing 2025 pdf epub mobi 電子書 下載