Verlag Psychologie Verlags UnionFritz Heider × The Notebooks / Perception Fritz HeiderPsychologie Verlags UnionHardcover1988 The Notebooks / Motivation Fritz HeiderPsychologie Verlags UnionHardcover1988 The Notebooks / Balance theory Fritz HeiderPsychologie Verlags UnionHardcover1988 The Notebooks / Attributional and interpersonal evaluation Fritz HeiderPsychologie Verlags Union 1988 The Notebooks / Methods, principles and philosophy of science Fritz HeiderPsychologie Verlags UnionHardcover1987 The Notebooks Fritz HeiderPsychologie Verlags Union The Notebooks / Units and coinciding units Fritz HeiderPsychologie Verlags UnionHardcover