Bhattacharyya, Samit. “Mineral Chemistry and Petrology of the Manganese Silicate Rocks of Vizianagaram Manganese Belt, Andhra Pradesh”. Journal of Geological Society of India 27, no. 2 (February 1, 1986): 169–184. Accessed September 20, 2024. https://geosocindia.com/index.php/jgsi/article/view/65644.