Harry Sootin

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Easy experiments with water pollutionHarry Sootin
Easy experiments with water pollution
Harry Sootin · 1974 · 109 pages
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Light experiments for home workshop and school laboratoryHarry Sootin
Light experiments for home workshop and school laboratory
Harry Sootin · 1963 · 93 pages
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Experiments With Electric CurrentsHarry Sootin
Experiments With Electric Currents
Harry Sootin · 1969 · 102 pages
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