1. Porphyrin in the Urine as a First Symptom of Lead Poisoning;de Langen;Acta med. scandinav.,1948
2. Reliability of the Urinary Porphyrin Test for Lead Absorption;Waldman;Arch. Indust. Hyg.,1950
3. Role of Porphyrins in Occupational Diseases Significance of Coproporphyrinuria in Lead Workers;Maloof;Arch. Indust. Hyg.,1950
4. Treatment of Acute Lead Encephalopathy;Chisolm;Pediatrics,1957
5. Lead Poisoning. Review of the Literature and Report on 45 Cases;Byers;Pediatrics,1959