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Published
Reston, VA : U.S. Geological Survey, 1999.
Online
Location
Internet Archive >> None
Format
Books / Online
Published
Reston, Va. : U.S. Dept. of the Interior, U.S. Geological Survey ; Denver, CO : USGS Information Services [distributor], 1999.
Online
Location
Internet Archive >> None
Format
Books / Online
Author
Alley, William M.
Published
Denver, Colo. : U.S. Dept. of the Interior, U.S. Geological Survey, 1999.
Online
Location
Internet Archive >> None
Format
Books / Online