Pierre Langlois (1909–1990) was a French philatelist who joined the Roll of Distinguished Philatelists in 1967."1967 Congress Honours" in The London Philatelist, Vol. 76, 1967, p. 100.
Langlois was a chemist by profession.
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External links http://www.academiedephilatelie.org/memorialtitulaires.html Photograph of Pierre Langlois