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- [6] Lead Poisoning Risk for Dairy Cows in the Semi-Arid Region of Pernambuco, Brazil Bulletin of Environmental Contamination and Toxicology, 2011, 86 : 199 - 202
- [7] 210Pb in Forage Consumed by Dairy Cows Bulletin of Environmental Contamination and Toxicology, 2009, 83 : 943 - 946