F. Magdalena, “ARCHIVAL MATERIALS IN THE UNITED STATES ON MINDANAO, SULU AND PALAWAN (1899-1945)”, MJ, vol. 19, no. 1-2, pp. 355–374, Jun. 2025, Accessed: Mar. 04, 2026. [Online]. Available: https://msu-mindanaojournal.com/index.php/ojs/article/view/355