W. Al-Bideri, Adnan, and Ali Nadeem Jawad. 2018. “Comparative Anatomical and Histological Study of Duodenum Between Laughing Dove Streptopelia Senegalensis and White Breasted Kingfisher, Halcyon Smyrnensis”. Al-Qadisiyah Journal of Pure Science 22 (1), 82 - 92. https://www.journalsc.qu.edu.iq.51-77-64-103.cpanel.site/index.php/JOPS/article/view/703.