Mohamed إ. س. TABLE OF CONTENTS: Volume 20- No.1- April 2016. University of Aden Journal of Natural and Applied Sciences, [S. l.], v. 20, n. 1, p. I-XI, 2016. Disponível em: https://uajnas.adenuniv.com/index.php/uajnas/article/view/309. Acesso em: 22 dec. 2024.