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Peter A. Baghurst, Evelyn F. Robertson, Robert K. Oldfield, Barbara M. King, Anthony J. McMichael, Graham V. Vimpani, Neil R. Wigg, Lead in the Placenta, Membranes, and Umbilical Cord in Relation to Pregnancy Outcome in a Lead-Smelter Community, Environmental Health Perspectives, Vol. 90 (Jan., 1991), pp. 315-320
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Baghurst et al. (1991) studied this question.
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