title: A RADIOTRACER STUDY OF THE PRODUCTION OF FORMALDEHYDE IN THE PHOTO-OXIDATION OF ETHYLENE IN THE ATMOSPHERE. I. METHOD AND PROCEDURES.
mesh_terms: D000397:Air Pollution; D001272:Atmosphere; D002247:Carbon Isotopes; D005030:Ethylenes; D005557:Formaldehyde; D008027:Light; D009584:Nitrogen; D010084:Oxidation-Reduction; D001335:Vehicle Emissions
chemical_list: D002247:Carbon Isotopes; D005030:Ethylenes; D001335:Vehicle Emissions; D005557:Formaldehyde; C036216:ethylene; D009584:Nitrogen
keywords: AIR POLLUTION; AUTOMOBILE EXHAUST; CARBON ISOTOPES; ETHYLENE; FORMALDEHYDE; LIGHT; NITROGEN; OXIDATION-REDUCTION