by Alfred E. Torrey, Frank A. Swenson, Geological Survey (U.S.). Topographic Division. Research and Technical Control Branch, George J. Edwards, Ivan D. Yost, Paul Averitt, Paul Livingston Applin, Rolland William Carter, Roy Edwin Oltman, Hubert Jerome Tracy, W. Kenneth Bach
A Progress Report, November L, 1950
by Alfred E. Torrey, Frank A. Swenson, Geological Survey (U.S.). Topographic Division. Research and Technical Control Branch, George J. Edwards, Ivan D. Yost, Paul Averitt, Paul Livingston Applin, Rolland William Carter, Roy Edwin Oltman, Hubert Jerome Tracy, W. Kenneth Bach
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