作者：Judith St. George 字数：1万字 出版社：Penguin Young Readers Group

When Meriwether Lewis, William Clark, and the "Corp of Discovery" left St. Louis, Missouri, on May 21, 1804, their mission was to explore the vast, unknown territory acquired a year earlier in the Louisiana Purchase. The travelers hoped to find a waterway that crossed the western half of the United States. They didn't. However, young readers will love this true-life adventure tale of the two-year journey that finally brought the explorers to the Pacific Ocean.

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