@book{354966,
	author = {de Silva, Leopoldo and Abon, Catherine C.},
	title = {Earth science:},
	publisher = {Commission on Higher Education,},
	year = {2016.},
	address = {Quezon City:},
	note = {This teaching guide by the Commission on Higher Education is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.}
}