@book{41050,
	author = {Thomson, George Derwent.},
	title = {Los primeros filósofos /},
	publisher = {UNAM, Plaza y Valdés },
	year = {1988.},
	series = {Problemas científicos y filosóficos.},
	address = {México },
	edition = {2 ed.},
	note = {Problemas cientificos y filosoficos.}
}