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<xml><bibliography><APA>Pensri Pipatchollatee. (1989) Determination of volatile N-nitrosamines in industrial air. Mahidol University,:ม.ป.ท.</APA><Chicago>Pensri Pipatchollatee. 1989. Determination of volatile N-nitrosamines in industrial air. ม.ป.ท.:Mahidol University,;</Chicago><MLA>Pensri Pipatchollatee.  Determination of volatile N-nitrosamines in industrial air.  ม.ป.ท.:Mahidol University, 1989. Print.</MLA></bibliography></xml>
