(9780231075619) - Dimensions: 208 x 140 x 22 mm - ISBN: 9780231075619 - Number of pages: 277 - Columbia University Press - Weight: 340 g | Universe Down to Earth, Kirkwood Gaps
(9781426218330) - Dimensions: 232 x 276 x 22.86mm | 1,496.85g - Format: 304 pages - ISBN: 9781426218330 - Languages: English - United States - National Geographic Society | Six continents