1999 - Quasars and Active Galactic Nuclei an Introduction (Paperback) → Hardcover ISBN-13: 9780521479899 ISBN-10: 0521479894 Genres: Science & Math, Engineering & Transportation 1 1999 - Quasars and Active Galactic Nuclei an Introduction (Hardcover) → Paperback ISBN-13: 9780521474771 ISBN-10: 0521474779 Genres: Science & Math, Engineering & Transportation, Substores ? |