000 00298nam a2200121Ia 4500
008 221117b |||||||| |||| 00| 0 eng d
040 _aBGL
_cBGL
100 _aSingh Gurdev
245 0 _aInformation Sources,Services & Systems
260 _aDelhi
_bPh Learning
_c2010
300 _a517p
942 _cGB
999 _c25997
_d25997