Kaur, Manpreet, and Manoj Kumar. “Study of Avian Species in Relation to Exotic Trees at Ludhiana, Punjab”. International Journal of Bio-resource and Stress Management 10, no. Oct, 5 (November 9, 2019): 507–512. Accessed January 11, 2026. https://ojs.pphouse.org/index.php/IJBSM/article/view/3871.