2007 - Foundations of Astronomy (Paperback) → Paperback ISBN-13: 9780495387251 ISBN-10: 0495387258 Genre: Science & Math ? 2006 - Foundations of Astronomy (Paperback) → Paperback ISBN-13: 9780495015932 ISBN-10: 0495015938 Genre: Science & Math ? 1999 - Horizons Exploring the Universe [International Version] (Paperback) ISBN-13: 9780534373832 ISBN-10: 0534373836 Genres: Science & Math, Engineering & Transportation ? Horizons Exploring the Universe [Astronomy] (Paperback) ISBN-13: 9780534524340 ISBN-10: 0534524346 Genre: Science & Math 1 Solar System Plus Info Trac (Paperback) ISBN-13: 9780534547660 ISBN-10: 0534547664 Genre: Science & Math ? |