The Truman Library has approximately 500 interviews supplementing the written record of Harry S. Truman's life and times. The interviews are available in transcript form and range in length from fewer than 10 to over 1,000 pages, with most being between 20 and 200 pages. Researchers may obtain through interlibrary loan only those oral histories that are not available online. Description from site
"On March 12, 1947, President Harry S. Truman presented this address before a joint session of Congress. His message, known as the Truman Doctrine, asked Congress for $400 million in military and economic assistance for Turkey and Greece."