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11
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12
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13
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14
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Phases of matter a science unit for the upper elementary grades ; teacher's guide.
Baskı/Yayın Bilgisi 1968Kitap -
16
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Position and motion a science unit for elementary grades teacher's guide.
Baskı/Yayın Bilgisi 1967Kitap -
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Position and motion a science unit for the upper elementary grades ; student manual.
Baskı/Yayın Bilgisi 1967Kitap -
20