ゲール文字
Lynam, E. W. (1969). The Irish character in print: 1571–1923. New York: Barnes & Noble (初版は Transactions of the Bibliographical Society, 4th Series, Vol. IV, No. 4, March 1924 の Oxford University Press による抜刷)
McGuinne, Dermot. Irish type design: A history of printing types in the Irish character. Blackrock: Irish Academic Press. ISBN 0-7165-2463-5