American Presidency Project
American Presidency Project: Hoover's Address Regarding Unemployment
This site from the University of Massachusetts, Boston provides the text of Herbert Hoover's radio address to the US on October 18, 1931, regarding the unemployment situation.
Yale University
Avalon Project: Truman Doctrine: Address Before Congress, March 12, 1947
A transcript of President Truman's speech delivered before a joint session of Congress outlining the need for financial assistance to Greece and Turkey for US influence in the region.