Pupuk Cair Produktif (PCP) dari Limbah Cair Industri Tempe Berdasarkan Berbagai Konsentrasi Penambahan EM4 = Productive Liquid Fertilizer from Liquid Waste Tempe Industry as Revealed by Various EM4 Concentration - Letsoin, Fred Leonardo (Program Studi Kimia FSM-UKSW, 2017)