title: DDT residues in forest floor and soil after aerial spraying, Oregon--1965-68.
mesh_terms: D002849:Chromatography, Gas; D003634:DDT / Q000032:analysis*; D005618:Fresh Water / Q000032:analysis; D009922:Oregon; D012987:Soil / Q000032:analysis*; D012988:Soil Microbiology
chemical_list: D012987:Soil; D003634:DDT