Results of an asbestos counting trial performed in france in 1979

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      <subfield code="c">B. Carton... [et al.]</subfield>
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      <subfield code="a">In France a law has been introduced giving a time-weighted average of the concentration of asbestos at the work place. This paper reports a large-scale comparison trial organized by INRS between the counting operators in 1979. Two methods of evaluating these results are presented: a comparison of the mean without any assumption on the standard deviation of the counts (Welch test) and a method a limit value</subfield>
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      <subfield code="g">nº 1, 1981 ; p. 9-21</subfield>
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