Teorya at Praktika ng Pagsasalin ng Philippine Society and Revolution 1968 to 1982 31 May 2002 Continue reading
Memories Visions and Scholarship and other essays – Centennial Lecture Series 31 December 2001 Continue reading
Annotated bibliography of Philippines Biodiversity, Filicopsida (Ferns) 31 December 2001 Continue reading
Annotated bibliography of Mangrove Biodiversity in the Philippines 31 December 2001 Continue reading