Institution
Philadelphia Archdiocesan Historical Research Center (PAHRC)
219
University of Notre Dame
216
Marquette University
148
Catholic Theological Union
145
College of the Holy Cross
43
Catholic University of America
38
University of Dayton
28
Boston College
18
Loyola University Chicago
14
Barry University
12
Georgetown University
6
St. Michael's College
5
University of St. Thomas
5
University of San Diego
3
Archdiocese of Cincinnati
2
Catholic Research Resources Alliance
2
Daughters of Charity
2
DePaul University
2
University of San Francisco
2
Loyola Marymount University
1