- Listenly
- Public Library
- Project Gutenberg
- George Washington Carver National Monument (Mo.) — Problems and exercises -- Juvenile literature
George Washington Carver National Monument (Mo.) — Problems and exercises -- Juvenile literature — Audiobooks
George Washington Carver National Monument Junior Ranger Activity Book: The Scientist
by United States. National Park Service
George Washington Carver National Monument Junior Ranger Activity Book: The Plant Doctor
by United States. National Park Service