Quasar Astronomy [Cambridge Astrophysics] (Hardcover) → Paperback ISBN-13: 9780521303187 ISBN-10: 0521303184 Genre: Science & Math ? Quasar Astronomy [Cambridge Astrophysics] (Paperback) → Hardcover ISBN-13: 9780521356749 ISBN-10: 0521356741 Genres: Science & Math, Engineering & Transportation ? |