http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Voluntary certification program for water works and water pollution control system operators in the State of Washington
Pacific Northwest Pollution Control Association
5 unnumbered pages, 132 columns. ; 28 cm.
Administered by Water Supply and Waste Unit, Washington State Health Services Division, Department of Social and Health Services, Pacific Northwest Section, American Water Works Association, [and] Pacific Northwest Pollution Control Association.