1. National Archives and Records Administration (NACP), College Park, MD.
2. Colonial Pathologies
3. Annual Report of the Bureau of Customs and of Foreign Commerce of the Philippine Islands, for the Year Ended December 31, 1916. Manila: Bureau of Printing, 1917.
4. Annual Report of the Insular Collector of Customs for the Fiscal Year Ended June 30, 1908. Manila: Bureau of Printing, (ARICC), 1908.
5. Annual Report of the Insular Collector of Customs for the Fiscal Year Ended June 30, 1909. Manila: Bureau of Printing, 1909.