000 00321nam a2200121Ia 4500
008 170101s1952 xx 000 0 und d
082 _a155.4 HAV
100 _ahavighurst Robert J.
245 0 _aDevelopmental Tasks and Education
260 _aNew York
_bDavil Mckay Co.Inc.
_c1952
300 _a100 p.
942 _2ddc
_cB
999 _c244466
_d244466