00937cam a2200265 4500 gs 68000339 DLC 20260227111423.0 690605s1968 dcu b 00010 eng c gs 68000339 //r85 U.S. Geological Survey Library QE75.C5 no. 561 TN271.G6 V34 Copy 2. 669.9/52/2 VanSickle, Gordon H., 1930- An atomic-absorption method for the determination of gold in large samples of geologic materials, by Gordon H. VanSickle and Hubert W. Lakin. Washington [U.S. Govt. Print. Off.] 1968. iii, 4 p. 27 cm. United States. Geological Survey. Circular 561 Bibliography: p. 3-4. Gold Assaying. Spectrophotometry. Lakin, Hubert William, 1907- joint author. Geological Survey circular ; 561. 30540 30540