Physical, Chemical, and Sensory Characteristics Evaluation of Bread from Composite Flour of Wheat, Cassava, Soybean, and Potato Starch with the addition of Xanthan Gum - S., Pitaria Ferawati; Program Studi Ilmu dan Teknologi Pangan Fakultas Pertanian USU Medan (Universitas Sumatera Utara, 2014)