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<p>A study of the durability of roofing made with Asplund wood fibers was conducted from 1942 to 1967.Concentrations of 0 to 60 percent wood fibers (oak or pine) prepared by three variations of the Asplund process were evaluated.All the mineral-surfaced roll
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<br>Subjects: Roofing, Bituminous.; Felt.</div>
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Greenfeld, Sidney H.</div>
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