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In page Scrooge McDuck:

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After this point, Barks produced most of his longer stories in Uncle Scrooge, with a focus mainly on adventure, while his ten-page stories for Walt Disney's Comics and Stories continued to feature Donald as the star and focused on comedy. In Scrooge's stories, Donald and his nephews were cast as Scrooge's assistants who accompanied the latter in his adventures around the world. This change of focus from Donald to Scrooge was also reflected in stories by other contemporary writers. Since then, Scrooge remains a central figure of the Duck comics' universe, thus the coining of the term "Scrooge McDuck Universe".[citation needed]