Transport and General Workers Union Ychwanegu i'r clipfwrdd C9/2 Ffeil = File 1985-1994 Rhan oIan and Thalia Campbell Papers,
U. S. A Ribbon Exhibition Ychwanegu i'r clipfwrdd C2/1 Ffeil = File 1982-2003 Rhan oIan and Thalia Campbell Papers,
Welsh Language Ychwanegu i'r clipfwrdd C5/3 Ffeil = File 1977-2002 Rhan oIan and Thalia Campbell Papers,
Womens' International Leage for Peace and Freedom Ychwanegu i'r clipfwrdd C2/5 Ffeil = File 1992-2007 Rhan oIan and Thalia Campbell Papers,
Women's TUC Ychwanegu i'r clipfwrdd C9/6 Ffeil = File 1979-2000 Rhan oIan and Thalia Campbell Papers,