Title: The last river
Subjects: Juvenile literature, Discovery and exploration, Explorers, Biography, Explorers, juvenile literature, Colorado river and valley, Colorado river and valley, juvenile literature, West (u.s.), West (u.s.), juvenile literature, Exploration, Ouvrages pour la jeunesse, Découverte et exploration, Discoveries in geography
Places: West (U.S.), Colorado River (Colo.-Mexico)
People: John Wesley Powell (1834-1902)