They Kept the Sea Lanes Open
Date: 1918
Medium: Commercial lithograph
Dimensions: sheet: 28 13/16 × 38 9/16 in. (73.2 × 97.9 cm)
Illustration Citation: World War I American poster advertising Liberty Loans
Credit Line: Gift of Helen Farr Sloan, 1978
Object Number: 1978-376
About: World War I poster promoting United States government liberty bonds campaign between 1917 and 1919 to raise money for its war expenses
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