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In page Jack Cole (artist):

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By the decade's end, however, Cole's feature was being created entirely by anonymous ghost writers and artists—including Alex Kotzky[citation needed] and John Spranger[citation needed]—despite Cole's name being bannered. One last stint by Cole himself in 1949 and 1950 could not save the title. Plastic Man was cancelled in 1956 after several years of reprinting the Cole material, and new stories by others.