http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Pesticide trends in major rivers of the United States, 1992-2010
National Water-Quality Assessment Program (U.S.)
1 online resource (vi, 63 pages) : color illustrations, color maps + 2 tables.
"National Water-Quality Assessment Program."
GPO Cataloging Record Distribution Program (CRDP).
Includes bibliographical references (pages 52-56).
Scientific investigations report ; 2014-5135