Contains approximately 150,000 discs from the early 1930s to the late 1960s, including comedy, drama, public affairs, musical variety, sports, news, information and international shortwave broadcasts. Everything recorded through 1953, plus a selection of programs after 1953, has been preserved and is cataloged on SONIC. Also check the publication "Radio Broadcasts in the Library of Congress, 1924-1941," (LOC, 1982).