Gorathoki, Madan, and Iswar Man Amatya. “Biological Denitrification of Nitrate Contaminated Ground Water With Elementary Sulfur”. Journal of Advanced College of Engineering and Management 5 (December 13, 2019): 63–69. Accessed December 26, 2024. https://nepjol.info./index.php/JACEM/article/view/26687.