PENGELOLAAN SUNGAI BERBASIS MASYARAKAT LOKAL DI DAERAH LERENG SELATAN GUNUNGAPI MERAPI (River Management Based on Local Community in the Southern Slope of Marapi Volcano) - Darmanto, Darmakusuma (Pusat Studi Lingkungan Hidup Universitas Gadjah Mada, 2013)