O, Un Gyong, Pyongyang University of Architecture
O. Idiaye, Chuks, Department of Agricultural Economics, University of Ibadan, Ibadan, Nigeria
Oba, A. I., Department of Vocational and Technical Education, Ahmadu Bello University, Zaria, Nigeria
Octariani, Dhia, Universitas Islam Sumatera Utara
Octastefani, Theresia, College of Humanities and Social Sciences, National Dong Hwa University, Taiwan.
Octavia N, Rini , Universitas Sumatera Utara
Octaviani, Widya Tatalia , Universitas Negeri Semarang
Octaviani, Yuni, Fakultas Kedokteran Gigi Universitas Syiah Kuala
Octaviannus, Stephen , Universitas Sumatera Utara
Octaviany, Devy, Diponegoro
Octavius, Gilbert Sterling , Faculty of Medicine, University of Pelita Harapan, Karawaci, Tangerang, Banten, Indonesia
Octiara, Essie , Faculty of Dentistry, Universitas Sumatera Utara, Medan, Indonesia
Octiara, Essie , Universitas Sumatera Utara
Octiara, Essie, Faculty of Dentistry, Universitas Sumatera Utara
Octiara, Essie, Fakultas Kedokteran Gigi, Universitas Sumatera Utara
Octofryana Yousca Marpaung , Beny , Toba Lake & Sustainable Tourism Working Group, Universitas Sumatra Utara, Medan, Indonesia, 20155
Octora, Debi Dinha, Universitas Sumatera Utara
Octoriansyah, Dzikra Maula, Universitas Sumatera Utara
Ododa, Kennedy Okoth, Chuka University
Oesman, Roswita , Departemen Agroekoteknologi, Fakultas Pertanian, USU,Medan
Oesman, Roswita , Program Studi Agroteknologi Fakultas Pertanian Universitas Pembinaan Masyarakat Indonesia
Ogolla, Fredrick, Chuka University
Ogunlela, A. O., Department of Agricultural and Bio-systems Engineering, Faculty of Engineering and Engineering Technology, University of Ilorin, Ilorin, Nigeria
OGUZ, Cennet, Department Agricultural Economics, Selcuk University, Turkey
Ogwu, Matthew, Goodnight Family Department of Sustainable Development, Living Learning Center, Appalachian State University, USA

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