00977cam a2200265 4500 gs 67000305 DLC 20260227111421.0 690307s1967 dcua b 000 0 eng c gs 67000305 U.S. Geol. Survey. Library DLC DLC QE75 .C5 no. 544 Huffman, Claude, 1922- Determination of gold in geologic materials by solvent extraction and atomic-absorption spectrometry, by Claude Huffman, Jr., J. D. Mensik, and L. B. Riley. Washington [U.S. Govt. Print. Off.] 1967. iii, 6 p. illus. 26 cm. United States. Geological Survey. Circular 544 Bibliography: p. 6. Gold Metallurgy. Cyanide process. Gold Spectra. Mensik, J. D., joint author. Riley, L. B. (Leonard Benjamin), 1905- joint author. Geological Survey circular ; 544. 30387 30387