Tyagi, Rajeev. 2011. “Chronic Effect Due to Changes in the Contents of Urea & Creatinine in Edible Cat Fish Channa Punctatus (Bloch), under the Stress of Sub Lethal Concentration of Methyl Parathion – a Pesticide”. Environment Conservation Journal 12 (3):89-92. https://doi.org/10.36953/ECJ.2011.120317.