Help your respirator help your respiration

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      <subfield code="a">Help your respirator help your respiration</subfield>
      <subfield code="c">by Edward D. Dionne</subfield>
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      <subfield code="a">The human respiratory system is highly efficient, and so are respirators when both are in top working order. Check both with the guidelines that presents this article</subfield>
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      <subfield code="g">Vol. 126, nº 3, September 1982 ; p. 39-44</subfield>
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