WWitthayāsāt matthayom sīWitthayāsāt matthayom sīde Rangsī Thēphatsadin Na ʻAyutthayā, William J. GedneyMateriasScienceTextbooksStudy and teaching (Secondary)Ediciones (1)Witthayāsāt matthayom sī (1937)Rōngphim Sīhong · thaMás obras de Rangsī Thēphatsadin Na ʻAyutthayāKKhūmư̄ Phra ʻAphaimanī tō̜n 23 thưng tō̜n 26Khūmư̄ Phra ʻAphaimanī tō̜n 23 thưng tō̜n 26WWitthayāsāt matthayom tonWitthayāsāt matthayom tonPPhūmisāt læ prawattisātPhūmisāt læ prawattisāt