TY - BOOK AU - Grimes,D.J. AU - Marranzino,A.P. TI - Direct-current arc and alternating-current spark emission spectrographic field methods for the semiquantitative analysis of geologic materials, T2 - Geological Survey circular 591 AV - QE75 .C5 no. 591 U1 - 543/.6 PY - 1968/// CY - Washington KW - Spectrum analysis KW - Geology KW - Fieldwork KW - Geochemistry N1 - Bibliography: p. 6 ER -