Harris, Godfrey <br/><br/>
Improving Your Concentration Skills   Focusing Attention on the Business at Hand 

 - 2th ed.  
 - Bombay  Jaico Publishing House  2004 
 - 112p 
<br/><br/> includes index and biblioraphy 
<br/><br/><label>ISBN: </label>817224732X     125 
<br/><br/><label>Dewey Class. No.: </label>O22  / H240