http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Effects of snowmobile use on snowpack chemistry in Yellowstone National Park, 1998
iv, 23 pages : illustrations (some color), maps (some color) ; 28 cm.
by George P. Ingersoll ; prepared in cooperation with the National Park Service.
Includes bibliographical references (pages 22-23).
Water-resources investigations report ; 99-4148