Haygood, William Converse. "Leon Carnovsky: A Sketch." The Library Quarterly: Information, Community, Policy 38, no. 4 (1968): 422-28. Accessed July 7, 2021. http://www.jstor.org/stable/4305930.
"United States Census, 1910," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:M214-7DD : accessed 7 July 2021), Isaac Carnowsky, St Louis Ward 4, St Louis (Independent City), Missouri, United States; citing enumeration district (ED) ED 62, sheet 1A, family 14, NARA microfilm publication T624 (Washington D.C.: National Archives and Records Administration, 1982), roll 812; FHL microfilm 1,374,825.
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