Jain A K <br/><br/>
Product design and test marketing of information products/services 
Jain A K And Others 
 - New Delhi  New Delhi, Oxford & IBH Publishing  1999 
 - 138p 
<br/><br/><label>ISBN: </label>81-204-1350-4 
<br/><br/><label>Source: </label>Textbook