Pius IX. Breve de Pio IX concediendo indulgencia plenaria a los visitantes de la Catedral de Sonora, June 23, 1868.

Pius IX. Breve de Pio IX concediendo indulgencia plenaria a los visitantes de la Catedral de Sonora, June 23, 1868., Item: G535. Genaro García Collection Part 2: Archives and Manuscript Collections, BENSON-MS GARCIA Manuscripts. Benson Latin American Collection, The University of Texas at Austin. https://archives.lib.utexas.edu/repositories/4/archival_objects/278476 Accessed September 27, 2026.