Analisis Kandungan Bahan Organik, Nitrat dan Fosfat pada Sedimen Mangrove Jenis Avicennia dan Rhizophora di Desa Tapak Tugurejo, Semarang The Analysis of Organic Content, Nitrate, Phosphate in the Sediment of Mangrove Rhizophora dan Avicennia at Tapak Village, Tugurejo Semarang Download