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(2014). . Egyptian Journal of Science Education, 17(1), 129-172. doi: 10.21608/mktm.2014.112810
. "", Egyptian Journal of Science Education, 17, 1, 2014, 129-172. doi: 10.21608/mktm.2014.112810
(2014). '', Egyptian Journal of Science Education, 17(1), pp. 129-172. doi: 10.21608/mktm.2014.112810
. Egyptian Journal of Science Education, 2014; 17(1): 129-172. doi: 10.21608/mktm.2014.112810
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