@book{3489,
	author = {Ouspensky, Piotr Demianovich, 1878-1947},
	title = {Tertium organum:},
	publisher = {Ediciones Sol},
	year = {1950},
	address = {México},
	note = {Incluye índices},
	url = {http://www.consciouslivingfoundation.org/ebooks/Span14/Ouspensky%20PD%20-%20Tertium%20Organum.pdf}
}