Geophysical Investigations at the New Philadelphia Site, Pike County, Illinois, 2004-2006, Dr. Michael L. Hargrave, U.S Army Engineer Research and Development Center, Construction Engineering Research Laboratory, Champaign, IL 61826-9005, Figure 7, Magnetic Gradient Survey, Blocks 3, 4, 7 and 8
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Geophysical Investigations at the New Philadelphia Site, Pike County, Illinois, 2004-2006, Dr. Michael L. Hargrave, U.S Army Engineer Research and Development Center, Construction Engineering Research Laboratory, Champaign, IL 61826-9005, Figure 7, Magnetic Gradient Survey, Blocks 3, 4, 7 and 8
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2010-08-14



