Air quality concerns related to snowmobile usage in national parks
By: U.S. Department of the Interior, National Park Service, Air Resources Division.
Contributors: United States. National Park Service. Air Resources Division.
Publisher: the Division
Published: 2000
Place of publication: Denver, Colo
Language: eng
Format: Electronic resource
Subjects: Snowmobiles -- Motors -- Exhaust gas -- Environmental aspects -- Yellowstone National Park.; Air -- Pollution -- Yellowstone National Park.
Notes: Mode of access: Internet from DOI web site. Address as of 6/14/02: http://www2.nature.nps.gov/ard/pubs/snowmobiler̲eport.pdf; current access is available via PURL.