V. B. Rekha A. V. George and M. Rita. (2013). A comparative study of Water Quality Index (WQI) of Peruvanthanam and Valiyathodu sub-watersheds of Manimala river basin, Kerala, South India. IOSR Journal Of Environmental Science, Toxicology And Food Technology.
استشهاد بنمط شيكاغوV. B. Rekha A. V. George and M. Rita. A Comparative Study of Water Quality Index (WQI) of Peruvanthanam and Valiyathodu Sub-watersheds of Manimala River Basin, Kerala, South India. IOSR Journal Of Environmental Science, Toxicology And Food Technology, 2013.
MLA استشهادV. B. Rekha A. V. George and M. Rita. A Comparative Study of Water Quality Index (WQI) of Peruvanthanam and Valiyathodu Sub-watersheds of Manimala River Basin, Kerala, South India. IOSR Journal Of Environmental Science, Toxicology And Food Technology, 2013.