KUMAR, OM, SHASHI BISHT, and NEELU SINGH. 1990. “STUDIES ON WATER QUALITY, VEGETATION AND FISH OF SONG RIVER IN EASTERN DOON VALLEY FORESTS”. UTTAR PRADESH JOURNAL OF ZOOLOGY 10 (2):143-47. https://www.mbimph.com/index.php/UPJOZ/article/view/1200.