/ http://www.slideshare.net/images/logo.gif / 際際滷Share feed for 際際滷shows by User: ranggagap https://cdn.slidesharecdn.com/profile-photo-ranggagap-48x48.jpg?cb=1731336943 Ordinary Person.. interest in Geology... Surrounded by Awesome peoples in Gadjah Mada University, Geological Engineering... your future is in your hand!! so study hard!!