1996 - Elementary Categories Elementary Toposes [Oxford Logic Guides] (Paperback) ISBN-13: 9780198514732 ISBN-10: 0198514735 Genres: Nonfiction, Science & Math, Engineering & Transportation ? 1992 - Elementary Categories Elementary Toposes [Oxford Logic Guides ; 21] (Hardcover) ISBN-13: 9780198533924 ISBN-10: 0198533926 Genres: Nonfiction, Science & Math ? |