kumar, manoj. “Bird Diversity of Poplar (Populus Deltoides) Based Agroforestry System in Ludhiana, Punjab”. Indian Journal of Agroforestry 24, no. 2 (January 11, 2023). Accessed October 19, 2025. https://epubs.icar.org.in/index.php/IJA/article/view/120388.