Assessing compliance with 60-hertz magnetic-field exposure guidelines

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      <subfield code="a">Exposure limits for magnetic fields in the extremely low frequency range (3 to 3000 hertz) have been established by a number of organizations. The limits are generally intended to prevent overstimulation of electrically sensitive tissue and are expressed as ceiling values-levels not to be exceeded even momentarily. Exposures near or above the limits occur around high-current equipment and often  have large spatial and temporal variability</subfield>
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      <subfield code="d">Cincinnati, Ohio : American Industrial Hygiene Association : American Conference of Governmental Industrial Hygienists</subfield>
      <subfield code="g">Vol. 2, nº 2, January 2005 ; p. 77-85</subfield>
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