The Role of Partnership in Value Chain of Sweet Potato in Regency of West Java (Case Study of PT Galih Estetika Indonesia Partnership) - Farichatul Aeni, Eva; Agribusiness Study Program, Graduate School, Bogor Agricultural University Jl. Raya Dramaga, Graduate School Building IPB, Dramaga Campus IPB 16680 (School of Business, Bogor Agricultural University (SB-IPB), 2017)