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Abdullahi, Abubakar Sadiq, Geology Department, Faculty of Science, Federal University Birnin Kebbi, Nigeria
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Y
Abdullahi, Yahya Zakari, Department of Economics, Faculty of social sciences, Usmanu Danfodiyo University, Sokoto, Nigeria
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Abdulrahman, Ribwar K., Chemical Engineering Department, Faculty of Engineering, Koya University, Daniel Mitterrand Boulevard, Koya, Kurdistan Region, Iraq
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