@book{241,
	author = {McMahon, Rosemary and Barton, Elizabeth  Piot, Maurice},
	title = {Administración de la atención primaria de salud :},
	publisher = {Organización Panamericana de la  Salud,},
	year = {1989.},
	address = {Bogotá :},
	edition = {1a ed.}
}