WWitthayāsāt matthayom tonWitthayāsāt matthayom tonde Rangsī Thēphatsadin Na ʻAyutthayā, William J. GedneyMateriasScienceTextbooksStudy and teaching (Elementary)Ediciones (1)Witthayāsāt matthayom ton (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 sīWitthayāsāt matthayom sīPPhūmisāt læ prawattisātPhūmisāt læ prawattisāt