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1001 задача для умственного счета [electronic resource] / Sergei Aleksandrovich Rachinskii
Author:  Rachinskii, Sergei Aleksandrovich, 1836-1902
Subject:  QA, Word problems (Mathematics), Mathematics -- Problems, exercises, etc.
Format:   Text
Date issued:  2005
Language:   Russian
Publisher:  Project Gutenberg,
Rights:  Public domain in the USA.
Download link:  1001 задача для умственного счета [electronic resource] / Sergei Aleksandrovich Rachinskii