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 January 02, 2026.
