Rachinskii, Sergei Aleksandrovich,  1836-1902 <br/><br/>
1001 задача для умственного счета  [electronic resource] / 
Sergei Aleksandrovich Rachinskii 
 -  Project Gutenberg,  2005 
 - Project Gutenberg  16527 .
<br/><br/> Public domain in the USA. 
<br/><br/>Electronic text 
<br/><br/><label>Subjects--Index Terms: </label>Word problems (Mathematics) Mathematics -- Problems, exercises, etc. 
<br/><br/><label>LC Class. No.: </label>QA