@book{14152,
	author = {United Nations Educational, Scientific and Cultural Organization. Oficina Regional de Ciencia y Tecnología para América Latina y el Caribe},
	title = {Nuevas tendencias en la enseñanza integrada de las ciencias},
	publisher = {United Nations Educational, Scientific and Cultural Organization, },
	year = {1977.},
	address = {Montevideo : }
}