title: Persistence of methyl and ethyl parathion following spillage on concrete surfaces.
mesh_terms: D003252:Construction Materials; D008743:Methyl Parathion / Q000032:analysis*; D010278:Parathion / Q000031:analogs & derivatives* / Q000032:analysis; D010573:Pesticide Residues / Q000032:analysis*; D013997:Time Factors; D014887:Weather
chemical_list: D010573:Pesticide Residues; D008743:Methyl Parathion; D010278:Parathion