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A Microscope eyepiece graticule for the evaluation of fibrous dusts

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      <subfield code="a">A Microscope eyepiece graticule for the evaluation of fibrous dusts</subfield>
      <subfield code="c">W.H. Walton and S.T. Beckett</subfield>
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      <subfield code="a">A microscope eyepiece graticule has been designed specifically to help in the counting of respirable fibrous dust. This is now in use in a number of laboratories and has been found to have several advantages over conventional designs, in particular when determining the length and diameter of fibres</subfield>
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      <subfield code="a">Contaminantes químicos</subfield>
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      <subfield code="a">Contaminación atmosférica</subfield>
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      <subfield code="a">Beckett, S.T.</subfield>
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      <subfield code="a">The Annals of occupational hygiene</subfield>
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      <subfield code="t">The Annals of occupational hygiene</subfield>
      <subfield code="d">Oxford [etc.]</subfield>
      <subfield code="g">nº 1, July 1977 ; p. 19-23</subfield>
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