Economic aspects
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Economic aspects
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- World War, 1939-1945 + Economic aspects
- Technological innovations + Economic aspects
- Fossil fuels + Economic aspects
- Agriculture + Economic aspects
- Biomass energy + Economic aspects
- Military readiness + Economic aspects
- Motion picture industry + Economic aspects
- Algae + Economic aspects
- Fungi + Economic aspects
- Sub focus of15
- Agriculture + Economic aspects
- Military readiness + Economic aspects
- Agriculture + Economic aspects -- United States -- Juvenile literature
- Motion picture industry + Economic aspects
- Motion picture industry + Economic aspects -- Juvenile literature
- Technological innovations + Economic aspects
- Fossil fuels + Economic aspects -- Juvenile literature
- Agriculture + Economic aspects -- United States -- Drama
- Fossil fuels + Economic aspects
- Biomass energy + Economic aspects
- World War, 1939-1945 + Economic aspects
- Fungi + Economic aspects
- Algae + Economic aspects -- Juvenile literature
- Biomass energy + Economic aspects -- Juvenile literature
- World War, 1939-1945 + Economic aspects -- Juvenile literature