000 00251nam a2200109Ia 4500
008 240421s9999 xx 000 0 und d
100 _aSingh, Manju
245 0 _aParyavaran Adhyayan
260 _aNew Delhi
_bDPH
_c2006
300 _a328p.
942 _cBK
999 _c11592
_d11592