@book{8057,
	author = {Realuyo, Zenaida M. and Ilarde, Isabelina D.},
	title = {Basic concepts in Earth Science},
	publisher = {Goodwill Trading,},
	year = {1987.},
	address = {Manila:},
	edition = {Rev.ed},
	note = {Includes bibliographical references and index.}
}