1840 in the United States (English Wikipedia)

Analysis of information sources in references of the Wikipedia article "1840 in the United States" in English language version.

refsWebsite

Global rank English rank

low place

low place

1web.archive.org

1^st place

1^st place

historync.org

CommunicationSolutions/ISI, "Railroad — Wilmington & Raleigh (later Weldon)", North Carolina Business History, 2006, accessed 1 February 2010
CommunicationSolutions/ISI, "Railroads — prior to the Civil War" Archived 2011-07-26 at the Wayback Machine, North Carolina Business History, 2006, accessed 1 February 2010

web.archive.org

CommunicationSolutions/ISI, "Railroads — prior to the Civil War" Archived 2011-07-26 at the Wayback Machine, North Carolina Business History, 2006, accessed 1 February 2010