Holley (Anne) (comp.), Clancy (Thomas Owen) (ed.), Hellmuth (Petra S.) (ed.), Koch (John T.) (ed.), Löffler (Marion) (ed.), Howells (Glenys) (assist. ed.), Hughes (Marian Beech) (assist. ed.), Minard (Antone) (assist. ed.): Celtic culture: a historical encyclopedia / John T. Koch, editor; Marion Löffler, managing editor; Marian Beech Hughes, assistant editor; Glenys Howells, assistant editor; Anne Holley, bibliographer; Petra S. Hellmuth, contributing editor (Ireland and Scotland); Thomas Owen Clancy, contributing editor (Scotland); Antone Minard, editorial assistant.