Nagaraja, M.S., and V.R. Ramakrishna Parama. “Soil Biological Parameters As Indicators of Sustainability of Natural and Agricultural Land Use Systems”. Annals of Tropical Research 22, no. 1&2 (November 23, 2000): 89–104. Accessed December 22, 2024. https://atr.vsu.edu.ph/article/view/492.