000			00293nam a2200109Ia 4500
008			191010s9999 xx 000 0 und d
082			_a151.1
100			_aDavid Krech
245			_aTheory and problems of special psychology
260			_aSingapore: McGraw-Hill Int. Book Co.
260			_c1948
999			_c65784 _d65781