http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Aerial application equipment for herbicidal drift reduction
Pacific Northwest Forest and Range Experiment Station (Portland, Or.)
21 pages : illustrations, graphs ; 27 cm.
Aerial spraying and dusting in agriculture
USDA Forest Service general technical report PNW ; 54