Chand Gupta, R., Chandna, P. and Kaushik , T.K. 2012. Analysis of wetland Birds as seen in Yamuna river at Okhla (Delhi), Faridabad and Palwal Districts in Haryana, India. Environment Conservation Journal. 13, 3 (Dec. 2012), 7–14. DOI:https://doi.org/10.36953/ECJ.2012.130302.