Physical and Chemical Properties of Restructured Sweetpotato Stick from Three Sweetpotato Cultivars - Susilo Utomo, Joko; Indonesian Citrus and Subtropical Fruits Research Institute (ICSFRI) No. 1 Raya Tlekung, Junrejo, Batu 65301 East Java, Indonesia (International Journal on Advanced Science, Engineering and Information Technology, 2015)