Engkir Sukirman, and Yosef Sarwanto. “X-RAYS DIFFRACTION STUDY ON THE IRON NANO PARTICLES PREPARED BY TWO STEPS MILLING METHOD”. Jurnal Sains Materi Indonesia, vol. 15, no. 2, Jan. 2014, pp. 67-73, doi:10.17146/jsmi.2014.15.2.4358.