White, William Frank, 1871-
A Scrap-Book of Elementary Mathematics : Notes, Recreations, Essays [recurso electrónico] / William Frank White - Project Gutenberg, 2012 - Project Gutenberg 40624 .
Public domain in the USA.
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Mathematical recreations
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A Scrap-Book of Elementary Mathematics : Notes, Recreations, Essays [recurso electrónico] / William Frank White - Project Gutenberg, 2012 - Project Gutenberg 40624 .
Public domain in the USA.
Text
Mathematical recreations
QA