| 100 Things to Know about Inventions • anticexlibris.ro | 46.98 RON |
| 100 Things to Know About Science | • carturesti.ro | 60.00 RON |
| 100 Things to Know About Money, Hardback - Victoria Williams • elefant.ro | 72.99 RON |
Looks at 100 inventions from throughout history.
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