O
Ojugo, Arnold Adimabua, Federal College of Education (Technical) (Nigeria)
Ojugo, Arnold Adimabua, University of Petroleum Resources Effurun (Nigeria)
Ojugo, Arnold Adimabua, Federal University of Petroleum Resources Effurun (Nigeria)
Oka Sudana, A.A. Kompiang, Udayana University (Indonesia)
Okon, Eunice Chinatu, Botswana International University of Science and Technology (BIUST) (Botswana)
Okonji Eboka, Andrew, Federal College of Education Technical (Nigeria)
Okpako, Ejaita Abugor, University of Delta Agbor (Nigeria)
Okpeki, Ufuoma Kazeem, Delta State University (Nigeria)
Okpor, Margaret Dumebi, Delta State University of Science and Technology (Nigeria)
Okpor, Margareth Dumebi, Delta State University of Science and Technology Ozoro (Nigeria)
Olanipekun, Ayorinde Joseph, Federal University of Agriculture (Nigeria)
Olisa, Samuel Chukwuemeka, University of Nigeria Nsukka (Nigeria)
Oluchi Christiana, Ugbe, University of Nigeria (Nigeria)
Oluwafemi, Ilesanmi Banjo, Ekiti State University (Nigeria)
Omar, Driss Ait, Sultan Moulay Slimane University (Morocco)
Omar, Tamer, California State Polytechnic University (United States)
Omran, Safaa S (Iraq)
Onyeka Ekengwu, Bonaventure, University of Nigeria Nsukka (Nigeria)
Onyemenem, Innocent Sunny, Federal College of Education (Technical) (Nigeria)
Onyshchenko, Andrii, Taras Shevchenko National University of Kyiv (Ukraine)
Osmadi, Izzah Artikah, Universiti Teknikal Malaysia Melaka (Malaysia)
Otair, Mohammed A., Amman Arab University (Jordan)
Otakore, Debby Oghenevwede, Federal University of Petroleum Resources Effurun (Nigeria)
Ouchitachen, Hicham, Sultan Moulay Slimane University (Morocco)
Owolabi, Abimbola Basiru, national open University of Nigeria, Lagos (Nigeria)
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