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- [4] DETERMINATION OF THE RARE-EARTH ELEMENTS IN PHOSPHATE ROCKS USING BOTH INDUCTIVELY COUPLED PLASMA ATOMIC EMISSION-SPECTROMETRY AND INSTRUMENTAL NEUTRON-ACTIVATION ANALYSIS JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY-LETTERS, 1991, 153 (03): : 221 - 234
- [7] COMPARISON OF INDUCTIVELY COUPLED PLASMA MASS-SPECTROMETRY WITH INDUCTIVELY COUPLED PLASMA ATOMIC EMISSION-SPECTROMETRY AND INSTRUMENTAL NEUTRON-ACTIVATION ANALYSIS FOR THE DETERMINATION OF RARE-EARTH ELEMENTS IN GREEK BAUXITES SPECTROCHIMICA ACTA PART B-ATOMIC SPECTROSCOPY, 1991, 46 (01) : 51 - 65