Osmond, J. (1977) Creative Conflict. Routledge and Kegan Paul, London. Plaid Cymru Research Group (1969). An Economic Plan for Wales, Cardiff. Plaid Cymru (1974) Power for Wales: Plaid Cymru Election Manifesto Rawkins, P. (1977). Welsh Nationalism and the Crisis of the British State. Paper presented at the Glendon Conference on Minority Nationalism, York University, Toronto, quotation from Emrys Roberts, Letter to the Editor, Tribune, April 28, 1972. Rees, G. and Lambert J. (1979) Urban Development in a Peripheral Region: Some issues from South Wales prepared for the C.E.S. Conference, Urban Change and Conflict, University of Notting- hani. Williams, P. (1975) Interview, Aberystwyth, June 2, and a subseq- uent letter to the author.