ENVIRONMENTAL MANAGEMENT AT KUNING RIVER COURSE IN MERAPI VOLCANO YOGYAKARTA SPECIAL REGION (Pengelolaan Lingkungan Alur Kali Kuning di Gunungapi Merapi Daerah Istimewa Yogyakarta) - Darmanto, Darmakusuma (Pusat Studi Lingkungan Hidup Universitas Gadjah Mada, 2013)