เครื่องเขียน, กระดาษ, คลิปหนีบกระดาษ, ประกาศ, หน่วยความจำ, บันทึก, แผ่นกระดาษ, ว่างเปล่า, ติดฉลากตัวเอง
Public Domain
ภาพถ่ายปลอดค่าลิขสิทธิ์ที่เกี่ยวข้อง
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