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This work is in the public domain in the United States because it meets three requirements:
it was first published outside the United States (and not published in the U.S. within 30 days),
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it was in the public domain in its home country on the URAA date (January 1, 1996 for most countries).
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{{Information |Description={{en|1=Portrait of Vu Trong Phung, depicted in 1st cover of "Vu Trong Phung" by Lan Khai, Minh Phuong xuat ban, 1941.}} {{vi|1=Chân dung Vũ Trọng Phụng, được minh họa