Krishnamachari, Suganthy <br/><br/>
Mental mathematics 
Suganthy Krishnamachari 
 - 1st ed 
 - Chennai  CBH Publishers  2008 
 - 46 p. : ill 
<br/><br/><label>ISBN: </label>9788183080927 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mathematics
<br/><br/><label>Dewey Class. No.: </label>510 KRI