Pasangka, B., K. Brotopuspito, and H. Sianturi. “DETERMINATION OF RADIOISOTOPE CONCENTRATION IN MINING SAMPLES WITH THE SIMPLE AND NEUTRON ACTIVATION ANALYSIS IN WEST TIMOR ISLAND EAST NUSA TENGGARA”. Jurnal Fisika : Fisika Sains Dan Aplikasinya, Vol. 4, no. 2, Oct. 2019, pp. 85-92, doi:10.35508/fisa.v4i2.1833.