000 00319nam a2200133Ia 4500
008 241225s9999 xx 000 0 und d
020 _a0
082 _a155
_bPEN
100 _aPen J.
245 0 _aModern economics
260 _aNew Delhi :
_b,
_c1994
300 _a265.
650 _aDifferential developmental psychology
999 _c31417
_d31417