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<dl><dd>Journal of Research of the National Institute of Standards and Technology</dd>
<dd>Journal of Research of the National Institute of Standards and Technology</dd></dl><br>Subjects:  power line interference; acoustic calibrations;  acoustic measurements;  calibration;  electronic instrumentation;  microphone calibration</div>
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<dl><dd>Nedzelnitsky, Victor</dd>
<dd>Wagner, Randall P.</dd></dl></div>
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