1. Adamson, D. L. (1991) Class, Ideology and the Nation: A Theory of Welsh Nationalism (Cardiff: University of Wales Press).
2. Arthur, P. (1984) The Government and Politics of Northern Ireland, 2nd edn (London: Longman).
3. Balsom, D. (1979) The nature and distribution of Support for Plaid Cymru (Glasgow: Centre for the Study of Public Policy).
4. Balsom, D. and Burch M. (1980) A Political and Electoral Handbook for Wales (Farnborough: Gower).
5. Balsom, D. Madgwick, P. and Van Mechelen, D. (1982) The Political Consequences of Welsh Identity (Glasgow: Centre for the Study of Public Policy).