edited by H. Carter ; [assistant editor, H.M. Griffiths] ; forward by His Royal Highness The Prince of WalesPublished by the University of Wales Press for the Social Science Committee, Board of Celtic Studies, University of Wales1989
golygydd, H. Carter ; is-olygydd, H.M. GriffithsCyhoeddwyd gan Wasg Prifysgol Cymru ar ran Pwyllgor Gwyddorau Cymdeithasol, Bwrdd Gwybodau Celtaidd, Prifysgol Cymruc1980