Individual exposure to particulate air pollution and its relevance to thresholds for health effects : a study of traffic wardens

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      <subfield code="a">The objective is to investigate the differences between measurements of personal exposure to particulate air pollution and static area measurements in a group of people working close to traffic and to determine whether such differences might obscure any threshold for health effects in epidemiological studies</subfield>
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      <subfield code="g">Vol. 52, nº 12, December 1995 ; p. 790-792</subfield>
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