Indrayana, I. P. T. “A COMPREHENSIVE STUDY ON THE MICROSTRUCTURE AND OPTICAL PROPERTIES OF Fe3O4 NANOPARTICLES BY VARIATION OF TEMPERATURE AND NaOH CONCENTRATION”. JOURNAL ONLINE OF PHYSICS, vol. 5, no. 1, Dec. 2019, pp. 6-17, doi:10.22437/jop.v5i1.8166.