title: The first critique of Freud's metapsychology: an extension of George S. Klein's "two theories or one"?
mesh_terms: D001317:Austria; D005197:Famous Persons; D049672:History, 19th Century; D049673:History, 20th Century; D011572:Psychoanalysis / Q000266:history; D011574:Psychoanalytic Theory; D011584:Psychology / Q000266:history; D014481:United States