Sister Bonaventure Gierl, OSB papers, OSBCHI-D-GIERBONA. Benedictine Sisters of Chicago Archives.
Sister Bonaventure Gierl, OSB papers, OSBCHI-D-GIERBONA. Benedictine Sisters of Chicago Archives. https://osbchicagoarchives.libraryhost.com/repositories/2/resources/183 Accessed November 23, 2025.
