Mahmud N, Hisham Khamis N, Yahya A, Harun M, Baharom A, Khalil K, et al. Swiftlet Vocalization in Echolocation. IJET [Internet]. 2018 May 6 [cited 2024 Nov. 22];7(3.36):10-2. Available from: https://sciencepubco.com/index.php/ijet/article/view/29070