000 00453n a2200169 a 4500
000 B B
001 035919
005 20220204113517.0
020 _a978-81-203-4639-0
082 _a025.52
_bP13;9 GEN
100 _aSingh, Gurdev
245 _aInformation Sources, Services and Systems
260 _aNew Delhi
_bPHI Learning Private Limited
_c2013
300 _axviii,516p.
690 _aInformation Services,General Studies
908 _aT
999 _c35914
_d35914