Abstract: tract

Abstract: Samples of particles collected by impaction in the antarctic atmosphere near the earth's surface during November and December 1966 contained much higher concentrations of sulfur than similar samples collected in most parts ...

Abstract: The records from pollutant sensors abroad two aircraft are compared. The aircraft flew along arcs of either 80 or 120 km radius from the Gateway Arch in St. Louis. One aircraft contained a light-scattering instrument which ...