@book{2166,
	author = {Colombia. Ministerio de Educación Nacional},
	title = {Ciencias naturales y educación ambiental :},
	publisher = {Cooperativa Editorial Magisterio,},
	year = {1998.},
	series = {Serie Lineamientos Curriculares},
	address = {Bogotá :},
	edition = {1a ed.}
}