000 00519nam a22001217a 4500
008 230925b |||||||| |||| 00| 0 eng d
040 _aNational Science Library
_cNational Science Library
100 _aJha, Deepak Kumar
_912946
245 _aComparative study of features of delphion, QPAT, derwent innovation index (DII) and world intellectual property system (WIPS) of patent databases
260 _aNew Delhi:
_bCSIR-NISCAIR / CSIR-NIScPR,
_c2007-09
500 _aAssociateship in information science
942 _cBK
999 _c61738
_d61738