Author: Thailand. Samnakngān Lēkhāthikān Saphā Phūthǣn Rātsadō̜n. Samnakngān Prathān Saphā Phūthǣn Rātsadō̜n. Klumngān Prathān Saphā Phūthǣn Rātsadō̜n