Elbasha, N. M., Physics Department, Faculty of Science, Ain Shams University, Cairo, Egypt
Entezari, Ashkan, Department of New Energies and Environment, University of Tehran, Tehran, Iran
Eshetu, Sintayehu, Department of Forestry, college of Agriculture and Natural Resources, Mekdela Amba university, Tulu Awuliya, Gimba, 32, Ethiopia
Eshetu Abebaw, Sintayehu, Department of Forestry, College of Agriculture and Natural Resources, Mekdela Amba University, Tulu Awuliya 20975, Ethiopia

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