| Life Science (6 titles) |
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| Light and Sound Waves Close-Up (4 titles) |
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| Looking at Nature (14 titles) |
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| Look into the Human Body (6 titles) |
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| Matter Close-Up (4 titles) |
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| Members of the Animal Kingdom (6 titles) |
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| Motion Close-Up (4 titles) |
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| My First Animal Books (4 titles) |
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| Natural Resources Close-Up (4 titles) |
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| Nature's Changes (8 titles) |
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| Now We Know About (8 titles) |
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| Observar la naturaleza (Looking at Nature) (12 titles) |
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| Observar la Tierra (Looking at Earth) (8 titles) |
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| Plants Close-Up (8 titles) |
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| Pods, Troops, and Other Animal Groups (6 titles) |
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| Quel animal a ceci? (What Animal Has These Parts?) (6 titles) |
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| ¿Qué Tipo de Animal Es? (What Kind of Animal is It?) (6 titles) |
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| Science Sleuths (8 titles) |
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| Science Solves It (6 titles) |
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| Science to the Rescue (10 titles) |
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| Scientists in Action (8 titles) |
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| Seasons Close-Up (4 titles) |
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| Senses Close-Up (5 titles) |
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| Severe Weather Close-Up (6 titles) |
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Canada
USA
