/ http://www.slideshare.net/images/logo.gif / 際際滷Share feed for 際際滷shows by User: DouglasWalls https://cdn.slidesharecdn.com/profile-photo-DouglasWalls-48x48.jpg?cb=1523725809 Please take a look at my academia bio. http://ucf.academia.edu/DouglasWalls http://ucf.academia.edu/DouglasWalls