| 作者 (Author) | Marsh, Laura |
| Summary: Photographs and text trace the migrations of whales as they travel the world's oceans in search of food and mates. | |
| 等级 (MML) | MM Level-4.3 |
| 年级 (IL) | Lower Grades (LG K-3) |
| 字数 (Words) | 1764 |
| 类型 (Fiction) | Non-Fiction |
| 系列 (Series) | National Geographic Readers: Great Migrations; National Geographic Readers: Level 3; |
| Topic: Animals-Whales; Science-Nature; | |
