Srinivasa Rao, Ch and Venkateswarlu, B and Wani, S P and Dixit, S and Sahrawat, K L and Kundu, S  (2011) Benefits from Micro and Secondary Nutrients: Impacts on Farm Income and Livelihoods in Rainfed Tribal and Backward Regions of Andhra Pradesh.  Documentation. Central Research Institute for Dryland Agriculture, Hyderabad, India.