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New Jersey Department of Health. Health and hazardous waste(PDF). A Practitioner's Guide to Patients' Environmental Exposures. 1996, 1 (3): 1–8. (原始内容(PDF)存档于2016-04-15).
Toxicological Profile for Thorium(PDF). Agency for Toxic Substances and Disease Registry U.S. Public Health Service: 4. 1990 [2024-03-26]. (原始内容存档(PDF)于2004-10-21).