Mohamed مإس. SUBJECT INDEX (Volume 21 – 2017): Subject index of research papers published in the "University of Aden Journal of Natural & Applied Sciences", and their authors Volume 21 (April - December 2017). Univ. Aden J. Nat. and Appl. Sc. [Internet]. 2018 Apr. 30 [cited 2025 Apr. 4];22(1):75-80 & 223. Available from: https://uajnas.adenuniv.com/index.php/uajnas/article/view/156