000 00276nam a2200121Ia 4500
008 191031s9999 xx 000 0 und d
100 _a"Liebert (Robert M) etc.,"
245 0 _aDevelopment psychology Ed.9
260 _bPHI
260 _c1977
365 _b39
942 _cBK
999 _c209573
_d209573