  Observing Handbook and Catalogue of Deepsky Objects (Hardcover) → Paperback ISBN-13: 9780521256650 ISBN-10: 0521256658 Genre: Science & Math ?  Observing Handbook and Catalogue of Deepsky Objects (Paperback) → Hardcover ISBN-13: 9780521625562 ISBN-10: 0521625564 Genres: Science & Math, Engineering & Transportation ? |
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