McKeown, M., & O'Mahony, S. (1989). Two Seven Six Three: An analysis of fatalities attributable to civil disturbances in Northern Ireland in the twenty years between July 13, 1969, and July 12, 1989. Murlough Press.

McKeown, Michael, and Seán O'Mahony. Two Seven Six Three: An Analysis of Fatalities Attributable to Civil Disturbances in Northern Ireland in the Twenty Years Between July 13, 1969, and July 12, 1989. Murlough Press, 1989.