May 4, 1967, Library of Congress Legislative Reference Service: "Lowering the Voting Age"May 4, 1967Pauls, Frederick H.https://creativecommons.org/publicdomain/mark/1.0/enghttp://congressarchives.org/record/EMD_Working_Papers-f366-1967_05_04Legislative Reference Service Guide Of Sources With Information About Lowering The Voting Age