McMichael A. J. , Johnson H. M. Long-term mortality profile of heavily-exposed lead smelter workers J. Occup. Med., 1982, 24, 375-378 Molinini R. Intossicazione non professionals da piombo. Sul vino il primo sospetto. Federazione Medica, 1989, 42, 445-447 Stollery B. T. , Banks H. A. , Broadbent D. E. , Lee W. R. Cognitive funcioning in lead workers Br. J. Ind. Med. , 1989, 46, 698-707 Suma' mur P. K. Erythrocyte ZnPP in occupationally unexposed populations and relationship of erythrocyte ZnPP and blood lead in lead battery factory workers In: "Occupational and environmental chemical hazards. Cellular and biochemical indices for monitoring toxicity", Foa V. , Emmet E. , Maroni M. , Colombi A. , Exitors. 1987, 272-279 Tsuchiya K. Lead cap. 14, pagg. 298-353 in: Handbook on the toxicology of metals, 2nd edition, vol. II: Specific metals Editors: Friberg L. , Nordberg G. F. , Vouk V. B. - Elsevier, Amsterdam, New York, Oxford, 1986 Verschoor M. , Herber R. , Wielhuis R. , Wibowo A. Zinc protoporphyrin as an indicator of lead exposure: precision of zinc protoporphyrin in measurements. Int. Arch. Occup. Environ. Health, 1987, 59, 613-621 91