(1879). Statistical abstract of the United States: The national data book / US Department of Commerce, Economics and Statistics Administration, US Census Bureau. US Gov. Print. Off..

Statistical Abstract of the United States: The National Data Book / US Department of Commerce, Economics and Statistics Administration, US Census Bureau. Waschington, DC: US Gov. Print. Off., 1879.

Statistical Abstract of the United States: The National Data Book / US Department of Commerce, Economics and Statistics Administration, US Census Bureau. US Gov. Print. Off., 1879.