Fajriati, Imelda, 		Rizkiyah, Malawati, AND 		Muzakky, Muzakky.
" A Study of Solid-Liquid Extraction with HF And HNO3 as Solvent for Determination of Cr and Cu in the River Sediment near the Muria Nuclear Power Plant" <em>Jurnal ILMU DASAR</em> [Online], Volume 12 Number 1 (1 January 2012)