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In the ten years since the first edition of this textbook, there has been a dramatic increase in resources devoted to occupational and environmental health issues and a broadening scope of the issues. The late Dr Irving J. Selikoff, in his foreword to this edition, presents a succinct and perceptive analysis of the forces back of these changes. In keeping with the increased resources and number of publications, the second edition of the text has grown by 50% to almost 1500 pages and the number of contributors by a similar percentage to 160, most of whom are members of academic institutions. The considerable task of searching the pertinent literature apparently was coordinated by a project director and two assistants relying heavily on the electronic databases of the National Library of Medicine and two specialty databases maintained by the National Institute for Occupational Safety and Health. Much of the book's usefulness
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Harold J. Magnuson (1993) studied this question.
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