00333nam a2200121Ia 450000500170000000800410001708200140005810000230007224500550009526000370015030000090018765000150019620240821151556.0240821s9999||||xx |||||||||||||| ||und||  a157.9 MAI  aMaier, Norman R.F. 0aFrustration : The study of behavior without a goal  aMichiganbUniv of Michiganc1961  a264p  aPsychology