@book{297261,
	author = {Robles, Emil Charles.},
	title = {Estimates of Quaternary Philippine coastlines, land bridges, submerged river systems and migration routes: A GRASS GIS approach},
	publisher = {Hukay},
	year = {2013},
	url = {http://journals.upd.edu.ph/index.php/asp/issue/view/408/showToc}
}