000 00268nam a2200109Ia 4500
008 240421s9999 xx 000 0 und d
100 _aRao, V.K.
245 0 _aReadings In Learning Education
260 _aNew Delhi
_bCommonwealth
_c1997
300 _a327p.
942 _cBK
999 _c11490
_d11490