Helen Challand

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Books by Helen Challand (50 max)

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Basic Science Handbook K-3

1961

Wilbur L. Beauchamp, Helen Challand

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Pourquoi, comment?: 333 réponses

1965

Helen Challand

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Experiments With Electricity (New True Books: Science (Paperback))

1986

Helen Challand

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Experiments With Magnets

1986

Helen Challand

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Experiment With Electricity

2003

Helen Challand