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Lua i Stíl Chicago (17ú heag.)J. Walter Thompson Company agus United States. Bureau of the Census. Population and Its Distribution. 2nd ed., rev. and enl. New York: J. Walter Thompson, 1918.
Lua MLA (8ú heag.)J. Walter Thompson Company agus United States. Bureau of the Census. Population and Its Distribution. 2nd ed., rev. and enl. J. Walter Thompson, 1918.
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