Ekstraksi CeO2, La2O3 dan Nd2O3 dari bahan baku lokal LTJOH melalui proses leaching dan pengendapan senyawa oksida logam tanah jarang terseleksi = Extraction of CeO2, La2O3 and Nd2O3 from local raw materials through leaching and precipitation of selected rare earth metal oxides / Iftironi Haritsah