Věda • technika
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O'Doherty, Owen
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Nicholls, Lyn; Page, Andrew; Berry, Sunetra
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IGCSE, Letts Cambridge
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Hillard, David; Alexander, Serena
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Daniels, Anna
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Bone, Graham; Saunders, Nigel
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DK
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Li, Maggie
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Speirs, Tom; Wilson, Sir Robert; Leckie & Leckie
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Grinsell, Mark
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Wood, John
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Matthews, Margaret
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Vine, Christopher
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Wilson, Catherine
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Branley, Franklyn M.