Sansuda Chaiyasingh. (1990) The ascertaining of asbestos fibers from asbestos cement pipes. Mahidol University,:ม.ป.ท.Sansuda Chaiyasingh. 1990. The ascertaining of asbestos fibers from asbestos cement pipes. ม.ป.ท.:Mahidol University,;Sansuda Chaiyasingh. The ascertaining of asbestos fibers from asbestos cement pipes. ม.ป.ท.:Mahidol University, 1990. Print.