Kritsadapan Palakit และ Somkid Siripatanadilok. (2013) Biology and factors affecting tree-ring formation of some tree species at Sakaerat environmental research station. Kasetsart University:ม.ป.ท.Kritsadapan Palakit และ Somkid Siripatanadilok. 2013. Biology and factors affecting tree-ring formation of some tree species at Sakaerat environmental research station. ม.ป.ท.:Kasetsart University;Kritsadapan Palakit และ Somkid Siripatanadilok. Biology and factors affecting tree-ring formation of some tree species at Sakaerat environmental research station. ม.ป.ท.:Kasetsart University, 2013. Print.