/ http://www.slideshare.net/images/logo.gif / ºÝºÝߣShare feed for ºÝºÝߣshows by User: DiabElnigomui https://cdn.slidesharecdn.com/profile-photo-DiabElnigomui-48x48.jpg?cb=1523098082 PHD. in Economics, Sudan Academy of Sciences University– Sudan