000 00282nam a2200121Ia 4500
005 20250612122138.0
008 250601s1989 xx 000 0 eng d
100 _aR.K. verma
245 0 _aResearch methodology
260 _aNew delhi
_bAPH pub
_c1989
300 _a197
942 _2ddc
_cBK
999 _c139
_d139