Bhatia, A.S. <br/><br/>
Modern speed maths / 
A.S. Bhatia. 
 - New Delhi :  Regal Publications,  2016. 
 - 183 p. ; 23 cm 
<br/><br/> Includes bibliographical references. 
<br/><br/><label>ISBN: </label>9788184845525 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mental arithmetic