Morocco, U. I. Z. A. M. (2018). Abstracts of National PhD Students Days 2018 (NPSD’2018) 1st Edition, May 4-5, 2018, Université Ibn Zohr Agadir Maroc, Ouarzazate, Morocco. International Multidisciplinary Research Journal, 8(2). https://doi.org/10.25081/imrj.2018.v8.3674