Bilaketaren emaitzak - "Caves"
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1
Philippine caves beneath the earth's surface : conservation and management.
Argitaratua 2017Liburua -
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6
Report on a preliminary exploration of some caves in Southwestern Samar
Argitaratua izan da Leyte-Samar Studies (1968)Artikulua -
7
Team discovers what it takes to explore Philippine caves
Argitaratua izan da Philippine Daily Inquirer (1998)Artikulua -
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10
The agony and ecstasy in spelun king / Valentin C. Loyola
Argitaratua izan da Manila Bulletin (1993)Artikulua


