Purwaningsih, D. (2012) “MULTI-METAL ADSORPTIONS Ag (I), Pb (II), Cr (III), Cu (II) AND Ni (II) ON HYBRID ETILENDIAMINO-SILICA FROM GREEN RICE DRINKS”, Jurnal Penelitian Saintek, 14(1). doi: 10.21831/jps.v14i1.694.