List of presidents pro tempore of the United States Senate (English Wikipedia)

Analysis of information sources in references of the Wikipedia article "List of presidents pro tempore of the United States Senate" in English language version.

refsWebsite

Global rank English rank

216^th place

186^th place

1usconstitution.net

low place

low place

758^th place

500^th place

about.com

uspolitics.about.com

Gill, Kathy. "US Senate Organization". The New York Times Company. Retrieved October 19, 2009 – via About.com.

senate.gov

Davis, Christopher M. (December 20, 2012). The President Pro Tempore of the Senate: History and Authority of the Office (Report). Congressional Research Service. Retrieved February 23, 2015.

usconstitution.net

Mount, Steve. "Constitutional Topic: Presidential Line of Succession". USConstitution.net. Steve Mount. Retrieved October 19, 2009.