  1989 - The Mystery of Comets [Smithsonian library of the solar system] (Paperback) → Paperback ISBN-13: 9780874749687 ISBN-10: 0874749689 Genres: Science & Math, Engineering & Transportation ?  1981 - Orbiting the Sun Planets and Satellites of the Solar System [Harvard Books on Astronomy.] (Hardcover) ISBN-13: 9780674641259 ISBN-10: 0674641256 Genre: Science & Math ?  The Mystery of Comets [Smithsonian Library of the Solar System] (Paperback) → Paperback ISBN-13: 9780874749717 ISBN-10: 0874749719 Genre: Science & Math ? |
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