Barry, Robert <br/><br/>
Nan  a six sigma mystery 
Robert Barry. 
 - Delhi  Pearson Education  2005 
 - x, 278p.; 24cm. 
<br/><br/><label>ISBN: </label>8129708604 
<br/><br/><label>Dewey Class. No.: </label>658.4012  / B28N