Holding Institution
- Williams College36
- Bryn Mawr College34
- Indiana University Bloomington27
- University of Rochester25
- Rutgers University24
- The Nelson-Atkins Museum of Art24
- Fordham University22
- Lehigh University22
- Saint Louis University19
- University of California, Davis15
- Vassar College15
- Buffalo & Erie County Public Library13
- Grolier Club13
- General Theological Seminary10
- Conception Abbey and Seminary7
- New York Academy of Medicine7
- Jewish Theological Seminary of America6
- Science History Institute5
- Smith College5
- University of Dayton5