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1by Hedlund, David Carl, 1924-“...Geological Survey circular ;...”
Published 1979
Government Document Book -
2Published 1980“...Geological Survey circular ;...”
Government Document Book -
3Published 1987“...U.S. Geological Survey circular ;...”
Government Document Book -
4by Bartolino, James R.“...U.S. Geological Survey circular ;...”
Published 2002
Government Document Book -
5by Eisenhuth, H. P.“...U.S. Geological Survey circular ;...”
Published 1968
Government Document Book -
6