000 00256nam a2200109Ia 4500
008 240421s9999 xx 000 0 und d
100 _aChopra, Punam
245 0 _aPrograammed Learning
260 _aNew Delhi
_bA.P.H.
_c2014
300 _a118p.
942 _cBK
999 _c15691
_d15691