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Philadelphia Archdiocesan Historical Research Center (PAHRC)
21
Marquette University
10
Catholic Theological Union
5
University of Dayton
3
Catholic University of America
2
Barry University
1
Boston College
1
Catholic Research Resources Alliance
1
College of the Holy Cross
1
Georgetown University
1
Loyola Marymount University
1
Loyola University Chicago
1
University of Notre Dame
1