http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Ongoing modifications to root system architecture of Pinus ponderosa growing on a sloped site revealed by tree-ring analysis
Rocky Mountain Research Station (Fort Collins, Colo.)
1 online resource (11 pages) : color illustrations, color map
Includes bibliographical references (pages 9-11).