U.S. Geological Survey Heavy Metals Program Progress Report 1968
Geological Survey (U.S.), Michael Fleischer, Harold Edgar Thomas, Thomas P. Miller, Joseph Haffty, Leonard Benjamin Riley, Betsy A. Weld, Margaret S. Griffin, George W. Brett, Jim S. Hinds, Donald B. Hoover, Helen Laura Foster, James A. McConaghy, John Emery Wilson, John R. Ritter, Luna Bergere Leopold, Norman J. Page, Robert Sprague Jones, J. A. Dietrich, Raymond L. Elliott, Richard R. Cunningham
