Peekamon Ponmanee และ Pitsanupong Kanjanapayont. (2013) STRAIN ANALYSIS OF ROCKS IN THE LANSANG WATERFALL, CHANGWAT TAK, THAILAND. Chulalongkorn University:ม.ป.ท.Peekamon Ponmanee และ Pitsanupong Kanjanapayont. 2013. STRAIN ANALYSIS OF ROCKS IN THE LANSANG WATERFALL, CHANGWAT TAK, THAILAND. ม.ป.ท.:Chulalongkorn University;Peekamon Ponmanee และ Pitsanupong Kanjanapayont. STRAIN ANALYSIS OF ROCKS IN THE LANSANG WATERFALL, CHANGWAT TAK, THAILAND. ม.ป.ท.:Chulalongkorn University, 2013. Print.