title: Identification of grades of fuel oil by red-green deficient observers.
mesh_terms: D003117:Color Vision Defects / Q000523:psychology*; D004192:Discrimination, Psychological; D005648:Fuel Oils; D006801:Humans; D010578:Petroleum; D014830:Vocational Guidance
chemical_list: D005648:Fuel Oils; D010578:Petroleum