[Interior politics] secret report - Mas y Sans, Sinibaldo de 1809-1868.; Botor, Carlos (Manila [s.n.], 1963)
The 3rd vol. of the author's Informe sobre el estado de las Islas Filipinas en 1842 (Madrid, 1843) secretly printed at the same time.
Keywords: Philippines -- Politics and government -- 1812-1898.