000 00286nam a22000977a 4500
008 230921b |||||||| |||| 00| 0 eng d
040 _aNational Science Library
_cNational Science Library
245 _aVoice & data
260 _aNew Delhi:
_bUsha Informatics Pvt. Ltd.,
942 _2udc
_cCR
999 _c61387
_d61387