"Ton klā" yuwachon sāngsan kānrīanrū : khrōngkān wičhai "nǣothāng kānčhat krabūankān rīanrū khō̜ng khrư̄akhāi yaowachon Čhangwat Surāt Thānī"

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Summary

Study on the knowledge development of children in Surat Thani Province, Southern Thailand.