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<http://webisa.webdatacommons.org/82228231>	<http://www.w3.org/ns/prov#value>	"TABLE 2 ______________________________________ Comparison of normal absorption coefficient, .alpha..sub.n for kenaf board and other materials tested by the impedance tube method (ASTM C384)..sup.a 16-mm Frequency 20-mm kenaf 13-mm" .
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