This five-volume edition of Aristotle's works in Greek is (with the exception of Vol. III) a photomechanical copy of the standard edition of Aristotle's works from 1831-1870.
Vols. I and II contain Aristotle's works. Volume III presents O. Gigon's revision and supplementation of Aristotle's fragments. Vol. IV presents a selection of the most important sections of Classical commentaries on Aristotle, together with a concordance with the Commentaria in Aristotelem Graeca. Vol. V contains a copy of H. Bonitz' Index Aristotelicus.