Richen, Enrique. Aviso sobre la vida y muerte del Padre Enrique Richen y Pedro Tomás Tello S. J., February 4, 1759.

Richen, Enrique. Aviso sobre la vida y muerte del Padre Enrique Richen y Pedro Tomás Tello S. J., February 4, 1759., Guide_No.: 1598. Guide to the Latin American Manuscripts in the University of Texas Library, Z 1601 T486. Benson Latin American Collection, The University of Texas at Austin. https://archives.lib.utexas.edu/repositories/4/archival_objects/500827 Accessed September 27, 2026.