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Creator
Gehres, W. S. (Wilmer Sherman), 1887-1963
Remove constraint Creator: Gehres, W. S. (Wilmer Sherman), 1887-1963
Creator
Hawkins, Geo. T. (George T.)
Remove constraint Creator: Hawkins, Geo. T. (George T.)
Publisher
Geological Survey (U.S.)
Remove constraint Publisher: Geological Survey (U.S.)