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Comparative study of features of delphion, QPAT, derwent innovation index (DII) and world intellectual property system (WIPS) of patent databases

Jha, Deepak Kumar

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

Associateship in information science