Author:Charles Jean de la Vallée-Poussin
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Works about de la Vallée-Poussin
edit- "Charles-Louis-Joseph-Xavier de la Vallée-Poussin," in Catholic Encyclopedia, (ed.) by Charles G. Herbermann and others, New York: The Encyclopaedia Press (1913)
Some or all works by this author are in the public domain in the United States because they were published before January 1, 1929.
This author died in 1962, so works by this author are in the public domain in countries and areas where the copyright term is the author's life plus 61 years or less. These works 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.
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