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2. Environmental lead and its paediatric significance;Barltrop;Postgrad. Med. J.,1969
3. A rapid procedure for the determination of lead in blood or urine in the presence of organic chelating agents;Bessman;J. Lab. Clin. Med.,1955
4. Improved method for measurement of delta-aminolevulinic acid dehydratase activity of human erythrocytes;Burch;Clin. Chem.,1971
5. Intestinal absorption of lead; Influence of age, calcium and magnesium;Fine;Pediatric Res.,1974