vol. 5. Caves to skyscrapers ---v.24. Italy---v.23. Australia and Oceania.---v.25. Index.----v.18.Great leaders.---v.13.the continents.---v.14.stories.---v.15.the human body---v.16.the far west.---v.2.Nature---v.8.treasures of the earth.---v.9.science and technology.---v.10.Myths and legends.---v.11. holidays around the world---v.6. Birds, fish and insects---v.3. Inventions---v.4. transportation---v.19.art through the ages---v.20. Mexico and the Caribbean---v.21.South America.---v.22. Great Britain and Ireland---v.1. Animals.