O'Brien, David J. (Personal Name)

Renewing the earth : Catholic documents on peace, justice, and liberation, 1987: CIP title page (David J. O'Brien) book title page (David J. O'Brien [co-editor])

LC data base, March 27, 1987 (hdg.: O'Brien, David J.)

Isaac Hecker, an American Catholic, 1992: CIP title page (David J. O'Brien) data sheet (born July 20, 1938)

College of the Holy Cross, History Department website, viewed June 21, 2019 (under Professors Emeriti: David J. O'Brien, Professor Emeritus; author of Renewing the earth; author of Isaac Hecker) https://www.holycross.edu/academics/programs/history/david-j-obrien