ตัวอักษร, เขียน, abc, การรู้หนังสือ, อ่าน, คณะกรรมการ, มือ, เรียน, บันทึก, การอบรม, ทักษะ
Public Domain
ภาพถ่ายปลอดค่าลิขสิทธิ์ที่เกี่ยวข้อง
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