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Parlindungan Lumbanraja
Universitas HKBP Nommensen
Indonesia
Agroekoteknologi, Associate Professor
Bangun Tampubolon
Universitas HKBP Nommensen
Indonesia
Samse Pandiangan
Universitas HKBP Nommensen
Indonesia
Johan Ambarita
Universitas HKBP Nommensen
Indonesia
Ferisman Tindaon
Universitas HKBP Nommensen
Indonesia