George Barr
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Outdoor Science Projects for Young People
Barr, George
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Sports Science for Young People (Dover Science For Kids)
Barr, George
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Science Research Experiments for Young People (Dover Children's Science Books)
Barr, George
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Science Projects for Young People (Dover Children's Science Books)
Barr, George
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Fascinating Science Experiments for Young People (Dover Children's Science Books)
Barr, George
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Entertaining With Number Tricks.
Barr, George
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Science Tricks and Magic for Young People
Barr, George
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Fun with Science: 46 Entertaining Demonstrations (Dover Children's Science Books)
Barr, George
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