Cutler, Ann  . <br/><br/>
Trachtenberg Speed System of Basic Mathematics /   Textual Documents 
NULL. 
 - New Delhi :   Rupa and Co ,   2003. 
 - 258 ;   24*18. 
<br/><br/><label>ISBN: </label>  
<br/><br/><label>Subjects--Index Terms: </label>Discrete Mathematics 
<br/><br/><label>Dewey Class. No.: </label>511.1  / CUT