http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
effects of oxidant air pollutants on soybeans, snap beans and potatoes
Corvallis Environmental Research Laboratory
by H. E. Heggestad, R. K. Howell and J. H. Bennett.
Research reporting series. EPA-600/3-77-128