Image: De La Vallée Poussin
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Description: Charles-Jean de La Vallée Poussin, Belgian mathematician
Title: De La Vallée Poussin
Credit: http://math.unipa.it/~circmat/Opere4.html
Author: Unknown authorUnknown author
Permission: more then 70 years old
Usage Terms: Public domain
License: Public domain
Attribution Required?: No
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