Sipahutar, Herbert, Biology Study Program, State University of Medan, Medan-Indonesia
Sipahutar, Herbert, Universitas Negeri Medan
Sipahutar, Ricky Supriadi
Sipana, Beulah, Department of Pharmacy, School of Medicine and Health Sciences, The University of Papua New Guinea, P.O Box 320, University 134 National Capital District, Papua New Guinea
Sipasi, Rani Pangesti
Sipayung, Boanerges Putra
Sipayung, Boanerges Putra, Department of Agribusiness, Faculty of Agriculture, Universitas Timor, Kefamenanu
Sipayung, Regina
Sipayung, Wahyuni, Politeknik Pembangunan Pertanian Medan
Sipyan, Donatus, Department of Plantation Crop Cultivation, Faculty of Agriculture, University of Papua, Manokwari

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