• The Community (1962)
• Distribution of Plants and Animals (1963)
• Echinoderms: Sea Stars and Their Relatives (1961)
• The First Many-Celled Animals: Sponges (1962)
• Flatworms (Platyhelminthes) (1962)
• The Jointed-Legged Animals: Arthropods (1962)
• The Physical Environment (1964)
• The Sea (1962)
• Stinging-Celled Animals: Coelenterates (1962)
• The Temperate Deciduous Forest (1962)
• The Tropical Rain Forest (1961)
• What Is an Amphibian? (1962)

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