<?xml version='1.0' encoding='utf-8'?>
<oai_dc:dc xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:oai_dc="http://www.openarchives.org/OAI/2.0/oai_dc/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.openarchives.org/OAI/2.0/oai_dc/ http://www.openarchives.org/OAI/2.0/oai_dc.xsd">
  <dc:contributor>N. Nakagaki</dc:contributor>
  <dc:creator>K.J. Hitt</dc:creator>
  <dc:date>2006</dc:date>
  <dc:description>This is a coverage of the boundaries and codes used for the U.S. Geological Survey's National Water-Quality Assessment (NAWQA) Program Study-Unit investigations in the conterminous United States, excluding the High Plains Regional Ground-Water Study. The data set represents the areas studied during the first decade of the NAWQA Program, from 1991-2001 ("cycle 1").</dc:description>
  <dc:format>application/pdf</dc:format>
  <dc:identifier>10.3133/70046917</dc:identifier>
  <dc:language>en</dc:language>
  <dc:publisher>U.S. Geological Survey</dc:publisher>
  <dc:title>National Water-Quality Assessment (NAWQA) Study-Unit Investigations in the conterminous United States 1991-2001</dc:title>
  <dc:type>reports</dc:type>
</oai_dc:dc>