Suganthy Krishnamachari <br/><br/>
Mental mathematics 
Suganthy Krishnamachari 
 - Chennai  CBH Publishers  c2005 
 - 46p. : ill. ; 25cm 
<br/><br/><label>ISBN: </label>9788183080910 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mathematics<br/>Mental mathematics
<br/><br/><label>Dewey Class. No.: </label>510 SUG