Scientific tasks and entertainment - puzzles, experiments, classes

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Perelman Y.I. Scientific Puzzles and Fun: Brain Teasers, Experiments, and Activities (1927) [djvu, 26 pages, 25 illustrations, 1.53 MB]
LF/433913554/R
Data sheet
- Name of the Author
- Перельман Yakov Исидорович
- Language
- Russian
- Release date
- 1927