BUMI SARI PRIMA, PT North Sumatera Manioc (Cassava) Starch, Other Stach, Juwan Chandra Suwarno. sales@bumisari.com (62-622) 23662, 25138 www.bumisari.com (62-622) 24148 Jl. Raya Tebing Tinggi Km. 7, Siantar Martoba