Pell, S. (May 1993). «Epidemiologists in industry. Past achievements, unexplored opportunities, and future needs». Journal of Occupational Medicine35 (5): 485-492. ISSN0096-1736. PMID8515320.
Pell, S. (May 1993). «Epidemiologists in industry. Past achievements, unexplored opportunities, and future needs». Journal of Occupational Medicine35 (5): 485-492. ISSN0096-1736. PMID8515320.