{"identifier":"nobleid:/w1/20260521/4CD3E98F","arkIdentifier":"ark:/48914/w1/20260521/4CD3E98F","version":1,"workTitle":"Age of Gainful White and Negro Male Workers of the United States, 1920 and 1930: Studies on the Age of Gainful Workers No. 4","workType":"Journal Article","authors":"William M. Gafafer","description":null,"workUrl":null,"existingDoi":"10.2307/4582244","createdAt":"2026-05-21T12:45:27.384881Z","canonicalUrl":"https://nobleid.org/ark:/48914/w1/20260521/4CD3E98F.v1"}