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Subjects
- Birds.[remove]5
- Zoology.3
- Agriculture.1
- Animals.1
- Archaeological sites -- Yucatán Peninsula.1
- Automobiles.1
- Boats -- Indochina.1
- Children.1
- Classrooms -- Michigan -- Ann Arbor.1
- Conservation of natural resources -- United States.1
- Dogsleds.1
- Eskimos.1
- Expeditions and surveys.1
- Fishes -- United States.1
- Herpetology.1
- Indians of North America -- Canada.1
- Inventors.1
- Labor movement -- United States -- History -- 19th century.1
- Lakes.1
- Lumber industry.1