DISTRIBUTION AND ABUNDANCE OF MANGROVE VEGETATION IN THE DISTURBED ECOSYSTEM OF SEGARA ANAKAN, CENTRAN JAVA (Distribusi dan Kemelimpahan Vegetasi Bakau di Ekosistem Hutan Rusak Segara Anakan Jawa Tengah) - Djohan, Tjut Sugandawaty (Pusat Studi Lingkungan Hidup Universitas Gadjah Mada, 2013)