Twelve-year-old AP is crazy about science but Kate, his older sister, has no time for him or his geeky experiments. All that changes when a curious abacus transports them back to Arthurian England. There, AP uses his knowledge to help them out of trouble. On a second adventure, they join the Sioux i
Abacus
β Scribed by MURRAY, F. J.
- Book ID
- 109683770
- Publisher
- Nature Publishing Group
- Year
- 1972
- Tongue
- English
- Weight
- 280 KB
- Volume
- 239
- Category
- Article
- ISSN
- 0028-0836
- DOI
- 10.1038/239471a0
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