@book{261459,
	author = {Christen, Arden G.},
	title = {Protección ambiental en el consultorio dental},
	publisher = {Interamericana},
	year = {1978},
	series = {Clinicas Odontológicas de Norteamérica 1973/1979},
	address = {Mexico},
	note = {pp 329-530}
}