Fired up: Catonsville files plus nine hearts; 25th anniversary of 'suffering love.'
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Gray, Francine du Plessex. "Profiles: Acts of Witness". New Yorker, 14 March, 1970.
McNeal, Patricia. Harder than War: Catholic Peacemaking in Twentieth-Century America. Brunswick NJ : Rutgers Univ. Press, 1992.
Polnar, Murray Polnar and Jim O'Grady. Disarmed and Dangerous: The Radical Lives and Time of Daniel and Philip Berrigan. New York : Basic Books, 1997.