000 00450n a2200169 a 4500
000 B B
001 035616
005 20220204113250.0
020 _a978-81-203-4639-0
082 _a025.52
_bP13;4 GEN
100 _aGudev Singh
245 _aInformation Sources,Services and Systems
260 _aNew Delhi
_bPHI Learning Private Limited
_c2013
300 _axviii,517p.
690 _aInformation Services,General Studies
908 _aG
999 _c35610
_d35610