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  1. 1
    by Hook, George, 1953-
    Published 1996
    “...QC 530 .H781 1996...”
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    Mini investigations.
  2. 2
    by Pedder, Ron, 1948-
    Published 1994
    “...QC 530 .P371 1994...”
    Book
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    Electricity activity sheets /

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