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Toxicology and Industrial Health|July 1, 1992
Multiple chemical sensitivity: treatment and followup with avoidance and control of chemical exposuresG E ZiemJournal of Occupational Medicine. : Official Publication of the Industrial Medical Association|November 1, 1989
Threshold limit values: historical perspectives and current practiceG E Ziem, B I CastlemanAmerican Journal of Industrial Medicine|January 1, 1988
Corporate influence on threshold limit valuesB I Castleman, G E ZiemPageof 1