Jha, Deepak Kumar <br/><br/>
Comparative study of features of delphion, QPAT, derwent innovation index (DII) and world intellectual property system (WIPS) of patent databases  

 - New Delhi:   CSIR-NISCAIR / CSIR-NIScPR,   2007-09 
<br/><br/> Associateship in information science