Valenzuela L. GREGORIO OSSA CERDA AND “OSSA Y ESCOBAR” . A MINING DEVELOPMENT BANK, C. 1855 - 1884. Revista de Historia Social [Internet]. 2011 May 15 [cited 2026 Aug. 19];13(2). Available from: https://journals.usach.cl/ojs/index.php/historiasocial/article/view/99