William J. Mahon

Proceedings of the Harvard Celtic Colloquium 1985

Proceedings of the Harvard Celtic Colloquium 1984

Catalogue of Irish manuscripts in Villanova University, Pennsylvania

Proceedings of the Harvard Celtic Colloquium, 8/9, 1988 and 1999 (Proceedings of the Harvard Celtic Colloquium)

Proceedings of the Harvard Celtic Colloquim, 1990 and 1991

Proceedings of the Harvard Celtic Colloquim, 1990 and 1991