Calabrese EJ, Stanek EJ, James RC and Roberts SM. 1997. Soil ingestion: A concern for acute toxicity in children. Environ. Health Perspect. 105:1354-1358.
Calabrese EJ, Stanek EJ, James RC and Roberts SM. 1997. Soil ingestion: A concern for acute toxicity in children. Environ. Health Perspect. 105:1354-1358.