| 作者 (Author) | Brown, Marc |
| Summary: On a class trip to Rainbow Rock State Park, Arthur and Buster uncover a rare fossil but have second thoughts about sharing their discovery with the park's paleontologists. | |
| 等级 (MML) | MM Level-3.4 |
| 年级 (IL) | Lower Grades (LG K-3) |
| 字数 (Words) | 4982 |
| 类型 (Fiction) | Fiction |
| 系列 (Series) | Arthur Chapter; |
| Topic: Mysteries-Treasures; Places-National Parks; Recommended Reading-Reading Rockets; Science-Archaeology; | |
