@book{109788,
	author = {Puerto Rico. Departamento de Instrucción.},
	title = {General characteristics that must prevail in the textbooks of Puerto Rico's educational system},
	publisher = {Department of Education},
	year = {1982.},
	address = {San Juan, P. R.},
	note = {Translation of : Caracterśticas generales de que deben prevalecer en los libros de texto del sistema educativo de Puerto Rico.}
}