http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Regional pollution potential in the northwestern United States
26 pages : illustrations, color maps ; 28 cm.
"Based on a 1998 final report for the USDA-FS Northern Region Air Program."
Includes bibliographical references (pages 25-26).