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Über die Psychologie des Unbewussten

by Carl Gustav Jung

"The original versions of both papers appeared some years ago, and they were published in English, under different titles, in the volume of Collected papers on analytical psychology edited by Constance Long (Second edition ... 1920) Of the first essay only the framework of its earlier form can be recognized and ... much new material has been added to the second essay."--Translator's pref.