RAMAKRISHNA, C., & MALLIKARJUNA RAO, D. (2010). Geochemical Exploration and Processing Studies for Graphite and Tungsten Minerals from Burugubanda-Tapaskonda Areas of East Godavari District. Asian Journal of Chemistry, 22(6), 4585–4590. Retrieved from https://asianpubs.org/index.php/ajchem/article/view/16767