PRATIWI, ANNISA NUR RAHMADANI (2024) PERBANDINGAN KADAR Ni-Fe SAMPEL RE-CHECK DAN RE-SAMPLING BERDASARKAN ANALISIS XRF (X-RAY FLUORESCENCE) DI TAMBANG UTARA DAN TAMBANG TENGAH PT. ANTAM Tbk, UBPN KOLAKA, SULAWESI TENGGARA = COMPARISON OF Ni-Fe CONTENTS OF RE-CHECK AND RE-SAMPLING SAMPLES BASED ON XRF (X-RAY FLUORESCENCE) ANALYSIS IN THE NORTH MINE AND CENTRAL MINE OF PT. ANTAM Tbk, UBPN KOLAKA, SOUTHEAST SULAWESI. Skripsi thesis, Universitas Hasanuddin.