SAGIR, M., and A. K. DOBRIYAL. “STRUCTURAL AND FUNCTIONAL DIVERSITY OF PERIPHYTON COMMUNITY FROM THE WESTERN NAYAR RIVER OF GARHWAL HIMALAYA”. UTTAR PRADESH JOURNAL OF ZOOLOGY, vol. 41, no. 1, Mar. 2020, pp. 15-29, https://www.mbimph.com/index.php/UPJOZ/article/view/1473.