title: [Studies on subjects exposed to lead in working sites with primary low lead concentration].
mesh_terms: D001870:Book Industry; D006801:Humans; D007855:Lead Poisoning / Q000652:urine*; D007982:Levulinic Acids / Q000652:urine; D009784:Occupational Diseases / Q000652:urine*; D011166:Porphyrins / Q000652:urine; D011327:Printing
chemical_list: D007982:Levulinic Acids; D011166:Porphyrins
vernacular_title: Untersuchungen bei Bleiexponierten mit primär niedriger Bleikonzentration am Arbeitsplatz.