00856nam0-22003131i-450-990001076540403321000107654FED01000107654(Aleph)000107654FED01000107654--------d--------km-y0itay50------baengProductive Thinkingedited by Max Wertheimerenlarged ed.New YorkHarper & Row1959c1945xvi, 302 p.ill.22 cmPsicologiaEpistemologia genetica150Wertheimer,Max<1880-1943>51234Wertheimer,Michael<1927- >ITUNINARICAUNIMARCBK9900010765404033215-0164916FI1FI1Productive thinking45694UNINAING01