Includes bibliographical references. / xvi, 201, [35] leaves : ill. ; 30 cm. / Title page, contents and abstract only. The complete thesis in print form is available from the University Library. / An introduction to the general topic of lead as an environmental contaminant and a critical review of epidemiloogical evidence of lead exposure and neuropsychological (particularly cognitive) development, a description of the research design and methods, and an evaluation of the validity of the precision of the study. / Thesis (Ph.D.)--University of Adelaide, Dept. of Community Medicine,1995