Dollisen-Miranda, Claire. “A GEOHISTORY OF THE ROLE OF AGUSAN RIVER TO THE LUMBER INDUSTRIES OF BUTUAN CITY, 1950s-1990s”. Mindanao Journal 45, no. 1 (May 3, 2025): 65–84. Accessed March 3, 2026. https://msu-mindanaojournal.com/index.php/ojs/article/view/39.