@book{1976,
	author = {Organizacion Mundial de la Salud},
	title = {Environmental Health Criteria 238: Extremely low frequency fields},
	publisher = {Organizacion Mundial de la Salud},
	year = {2007},
	address = {Ginebra},
	edition = {1° ed.},
	note = {Baja Depósito Caja 31 Junio 2019}
}