NAIDU, L G K, R S REDDY, K D SAH, B P BHASKAR, D DATTA, K V NIRANJANA, B A DHANORKAR, et al. “Mapping of Agro-Ecological Zones of Andhra Pradesh through Soil-Resource Data”. The Indian Journal of Agricultural Sciences 68, no. 10 (February 25, 2013). Accessed October 28, 2025. https://epubs.icar.org.in/index.php/IJAgS/article/view/27745.