This work is in the public domain in the United States because it was published before January 1, 1929. It was adapted by the Observatory from a version produced by Wikisource contributors.
The longest-living author of this work died in 1968, so this work is in the public domain in countries and areas where the copyright term is the author’s life plus 55 years or less. This work may be in the public domain in countries and areas with longer native copyright terms that apply the rule of the shorter term to foreign works.
Upton Sinclair (1878–1968) was an American Pulitzer Prize–winning writer, muckraker, and political activist. He was famous for his 1906 muckraking novel, The Jungle.
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