John Spearman (English Wikipedia)

Analysis of information sources in references of the Wikipedia article "John Spearman" in English language version.

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books.google.com

Death of John J. Spearman in the Iron Trade Review, Volume 48, June 1911, p. 1137

"John J. Spearman" (obituary). Pittsburgh, Pennsylvania: The Pittsburgh Press, June 1, 1911, p. 11 (subscription required).
John J. Spearman, in "The Death Roll." Greenville, Pennsylvania: Evening Record, June 1, 1911, p. 2.
"John J. Spearman" (obituary). Pittsburgh, Pennsylvania: The Pittsburgh Post, June 2, 1911, p. 2 (subscription required).