Erfundene Wirklichkeit. English The Invented reality : How do we know what we believe we know? : Contributions to constructivism / Ed. and with a commentary by Paul Watzlawick. - 1st ed. - New York : Norton, 1984. - 347 p. : ill. ; 22 cm. - 149 . Translation of: Die erfundene Wirklichkeit. Includes bibliogr. references and indexes. ISBN: 0393017311 Subjects--Topical Terms: Constructivism (Philosophy)Reality. Dewey Class. No.: 149