KEBERADAAN FUNGI MIKORIZA ARBUSKULA DI KAWASAN TAILING TAMBANG EMAS TIMIKA SEBAGAI UPAYA REHABILITASI LAHAN RAMAH LINGKUNGAN (The Presence of Arbuscular Mycorrhizal Fungi in the Tailings of Mining Gold Timika as An Attempt of Environmentally Friendly) - Suharno, Suharno (Pusat Studi Lingkungan Hidup Universitas Gadjah Mada, 2015)