http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Documentation of the Douglas-fir tussock moth outbreak-population model
Pacific Northwest Forest and Range Experiment Station (Portland, Or.)
J. J. Colbert, W. Scott Overton, and Curtis White.
USDA Forest Service general technical report PNW ; 89