หูฟัง, ชุดหูฟัง, เปิดหนังสือ, หนังสือเสียง, อ่าน, บันทึก, เทคโนโลยี, วรรณกรรม, ความรู้, ห้องสมุด, การเรียนรู้
Public Domain
ภาพถ่ายปลอดค่าลิขสิทธิ์ที่เกี่ยวข้อง
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