Description
Item Description:"Prepared in cooperation with the U.S. Environmental Protection Agency."
Physical Description:1 online resource (vi, 22 pages) : color illustrations, color maps.
Format:Mode of access: Internet from the GPO web site. Address as of 7/7/20: https://permanent.fdlp.gov/gpo140179/sir20195113.pdf ; current access is available via PURL.
Bibliography:Includes bibliographical references (pages 21-22).
ISSN:2328-0328 ;