Share no. 000324. Cia. Minera "La Constancia," S. A. signed by L. de la Garza, Gerente and R. R. Foster, Superintendente.

Share no. 000324. Cia. Minera "La Constancia," S. A. signed by L. de la Garza, Gerente and R. R. Foster, Superintendente., 40., Box: 9, Folder: H. Lázaro de la Garza Archive, 32814426. Benson Latin American Collection, The University of Texas at Austin. https://archives.lib.utexas.edu/repositories/4/archival_objects/300097 Accessed September 26, 2026.