Indigenous technology of tapping, collecting and processing of coconut (Cocos Nucifera) sap and its quality in Blitar Regency, East Java, Indonesia Journal title: Food Research Authors: Y. Somawiharja, D.M. Wonohadidjojo, M. Kartikawati, F.R.T. Suniati, H. Purnomo Subject(s): Agricultural Science, Nutrition and Metabolism, Food Science & Technology