000 00285nam a2200109Ia 4500
008 190719s9999 xx 000 0 und d
100 _aC.R. Kothari
245 0 _aResearch methodology : Methods & techniques
260 _aN.Delhi
_bwishwa Prakashan
_c1990
650 _aMath
942 _cBK
999 _c11817
_d11817