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''Measuring the confidence of 8th Grade Taiwanese Students' knowledge of Acids and Bases'' (3 h 20 m, 30 mayo 2012 año – 1 h 53 m, 5 sept 2012 año)

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14 dic 2017

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3 h 20 m, 30 mayo 2012 año

1 h 53 m, 5 sept 2012 año

~ 3 months and 8 days

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