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Walpole, Brenda.
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1988
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Professor Scientifix
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1984
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Wyatt, Valerie. Cupples, Pat.
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1990
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McGill, Ormond.
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1984
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Penrose, Gordon, 1925-
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1990
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Wyatt, Valerie. Cupples, Pat.
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1990
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Ontario Science Centre.
Publication Date:
1984
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