000 00254nam a2200109Ia 4500
008 240421s9999 xx 000 0 und d
100 _aSingh, S.R.
245 0 _aResearch Methodology
260 _aNew Delhi
_bA.P.H.
_c2013
300 _a301p.
942 _cBK
999 _c15699
_d15699