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Kores, Jaroslav. ().
Using Phun to Study "Perpetual Motion" Machines .
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Kores, Jaroslav.
Using Phun to Study "Perpetual Motion" Machines.
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Kores, Jaroslav.
Using Phun to Study "Perpetual Motion" Machines.
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Kores, Jaroslav.
Using Phun to Study "Perpetual Motion" Machines.
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