Banners Ychwanegu i'r clipfwrdd C1 Cyfres = Series 1978-2007 Rhan oIan and Thalia Campbell Papers, Files relating to banners produced by Thalia Campbell
Enviornment Ychwanegu i'r clipfwrdd C6 Cyfres = Series 1982-2008 Rhan oIan and Thalia Campbell Papers,
Labour Party Ychwanegu i'r clipfwrdd C8 Cyfres = Series 1980-2008 Rhan oIan and Thalia Campbell Papers,
Miscellaneous Ychwanegu i'r clipfwrdd C7 Cyfres = Series 1970-2004 Rhan oIan and Thalia Campbell Papers,
Nuclear weapons Ychwanegu i'r clipfwrdd C4 Cyfres = Series 1981-2011 Rhan oIan and Thalia Campbell Papers,
Religion, education and the Welsh language Ychwanegu i'r clipfwrdd C5 Cyfres = Series 1977-2006 Rhan oIan and Thalia Campbell Papers,
Trades Unions Ychwanegu i'r clipfwrdd C9 Cyfres = Series 1979-2000 Rhan oIan and Thalia Campbell Papers,