1999

David, S. B. ; Beroya-Eitner, Mary Antonette ; Billedo, E. B. ; Montero, A. ; Torres, A. (1999)
Geological Investigation Report on the Landslide Incident at the Cherry Hills Subdivision, Bgy. San Luis, Antipolo City.
In: Journal on Environment, Energy and Minerals, 2 (4)
Artikel, Bibliographie

1995

Billedo, E. B. ; Ancheta, G. C. ; Beroya-Eitner, Mary Antonette ; Luis, R. C. ; Macawili, J. P. ; Marquez, E. J. ; Monsanto, E. B. ; Queano, K. L. ; Querubin, C. L. (1995)
The Geology and Structures of San Ildefonso Peninsula, Casiguran, Aurora Province : Their Relation to the Northern Sierra Madre Orogeny.
In: Journal of the Geological Society of the Philippines, 50 (1)
Artikel, Bibliographie