1. Islams and Modernities;Al-Azmeh,1996
2. Hibok-Hibok volcano, Philippines Islands, and its activity since 1948;Alcaraz;The Volcano Letter,1952
3. Hibok-Hibok volcano, Philippines Islands, and its activity since 1948;Alcaraz;The Volcano Letter,1952
4. Confronting Catastrophe;Alexander,2000
5. Costa Rica: Land of Volcanoes;Alvarardo-Induni,1993