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DIRECT-CURRENT ARC AND ALTERNATING-CURRENT SPARK EMISSION SPECTROGRAPHIC FIELD METHODS FOR THE SEMIQUANTITATIVE ANALYSIS OF GEOLOGIC MATERIALS.GRIMES DJ; MARRANZINO AP.1968; GEOL. SURV. U.S.A., CIRC.; USA; 1968, NUM. 0591, P. 1 A 6Miscellaneous
