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Oahimire, Debrah Memshima, World Bank Africa Centre of Excellence, Centre for Oilfield Chemicals Research, University of Port Harcourt (Nigeria)
Ocheri, C, Department of Metallurgical and Materials Engineering, University of Nigeria, Nsukka (Nigeria)
Odugbose, Babasola Dapo, Department of Agricultural Engineering, College of Engineering and Environmental studies / Olabisi Onabanjo University, Ogun State (Nigeria)
Oduntan, Oluwafemi Babatunde, Department of Forestry, Wildlife, and Fisheries, College of Agricultural Sciences/ Olabisi Onabanjo University, Ogun State (Nigeria)
Odusanya, Olubunmi Abosede, Department of Crop Production, College of Agricultural Sciences/ Olabisi Onabanjo University, Ogun State (Nigeria)
Ogbonna, Joel Friday, World Bank Africa Centre of Excellence, Centre for Oilfield Chemicals Research, University of Port Harcourt (Nigeria)
Ogedengbe, Kolawole, University of Ibadan (Nigeria)
Ogunleye, P O, Centre for Energy Research and Training, Ahmadu Bello University, Zaria, Nigeria (Nigeria)
Ojonimi, I T, Department of Mining Engineering, University of Jos, Jos, Plateau State, Nigeria
2Department of Earth Sciences, Kogi State University, Anyigba, Nigeria (Nigeria)
Ojonimi, Ile Theophilus, Department of Mining Engineering, University of Jos, Nigeria (Nigeria)
Ojonimi, Theophilus Ile, Department of Mining Engineering, University of Jos, Jos, Plateau State, Nigeria (Nigeria)
Okeme, Ilemona C, Interface Analysis Center, School of Physics, HH Wills Physics Laboratory, University of Bristol (United Kingdom)
Oktaviani, Revia, Department of Mining Engineering, Mulawarman University (Indonesia)
Oktaviansyah, Aulia Rahman, Universitas Wienuwardhana Malang (Indonesia)
Okyere, Mustapha, Kwame Nkrumah University of Science and Technology, Department of Land Economy, Kumasi Ghana (Ghana)
Oljirra, Alemayehu, Department of Agricultural Economics and Agribusiness Management, Jimma University College of Agriculture and Veterinary Medicine (Ethiopia)
Olowu, Babajide Emmanuel, Department of Crop Production, College of Agricultural Sciences/ Olabisi Onabanjo University, Ogun State (Nigeria)
Onimisi, M, Department of Earth Sciences, Kogi State University, Anyigba, Nigeria (Nigeria)
Onuh, C Y, Department of Petroleum Engineering, Covenant University, Ota, Ogun State, Nigeria (Nigeria)
Opafola, Omobolaji Taofeek, Department of Civil Engineering, Olabisi Onabanjo University (Nigeria)
Otake, Tsubasa, Environmental Geology Laboratory, Division of Sustainable Resources, Graduate Study of Engineering, Hokkaido University, Sapporo 060-8628, Japan (Japan)
Ouargaga, F, Chemistry Department, Faculty of Sciences, Moulay Ismail University, Morocco (Morocco)
Ozcelik, Mehmet, Geological Engineering Department, Engineering Faculty, Suleyman Demirel University (Turkey)
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