Records, 1932-1986, of the constituency Labour Parties in the Rhondda Valley, comprising minute books, account books, and branch minutes. They consist of the records of the Rhondda Borough Labour Party and Trades Council, 1932-1935; the Rhondda West Divisional Labour Party, 1925-1965; the Rhondda East Constituency Labour Party, 1952-1971; and the Rhondda Constituency Labour Party, 1971-1986.