Alang, H.; Talumingan, C.; Rumagit, G. A. ANALISIS MARGIN PEMASARAN TOMAT DI DESA KOPIWANGKER KECAMATAN LANGOWAN BARAT KABUPATEN MINAHASA (Marketing Margin Analysis of Tomato in the Village of Kopiwangker District of West Langowan in Minahasa Regency). AGRIRUD 2019, 1.