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0 Elements of p-block, General properties of group 5A elements (group 15) February 19, 2018 by Heba Soffar · Published February 19, 2018 · Last modified November 21, 2020
0 Properties of Mechanical waves and Electromagnetic waves October 6, 2017 by Heba Soffar · Published October 6, 2017 · Last modified February 25, 2020
0 The function and structure of the root system in the plant January 24, 2015 by Heba Soffar · Published January 24, 2015 · Last modified November 21, 2019
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