000 00294nam a2200109Ia 4500
008 200527s9999||||xx |||||||||||||| ||und||
082 _a150.287 HEL
100 _aHelmstadter, G.C.
245 0 _aPrinciples of Psychological Measurement
264 _bAppleton-Century Crofts
_c1964
300 _a248p.
999 _c15162
_d15162