Items marked by the tag "Polk County Nebraska":

CODE: CD-NE-31143-1nc2003

CODE: CD-NE-31143-2nc2004

CODE: CD-NE-31143-2nc2005

CODE: CD-NE-31143-1nc2006

CODE: CD-NE-31143-2nc2007

CODE: CD-NE-31143-1nc2009

CODE: SM-3137525

CODE: SM-3139660

CODE: SM-3144595

CODE: SM-3147465

CODE: USGS-NE-31143