Proportional Representation Library  
   A source of information on proportional representation elections -- including beginning readings, in-depth articles by scholars and activists, an extensive bibliography, and a guide to relatedWeb sites.
   http://www.mtholyoke.edu/acad/polit/damy/prlib.htm

Proportional Representation Society of Australia  
   A society which promotes the Hare Clark Quota Preferential method of Proportional Representation (Quota Preferential is also known as Single Transferable Vote or STV).
   http://www.cs.mu.oz.au/~lee/prsa/

Illinois Citizens for Proportional Representation  
   A non-partisan group attacking winner-take-all elections by reviving three-member districts with cumulative voting for the Illinois House, as well as advocating for other forms of proportional representation and the instant runoff for single-seat offices.
   http://www.prairienet.org/icpr/

Under the Cloak of Patriotism  
   History of Proportional Representation in New York City Council Elections in the 1930s-1940s. Describes how World War II and the early Cold War influenced local politics and the fate of "PR."
   http://www.nyu.edu/gsas/dept/history/public_history/PR/

Washington State Citizens for Proportional Representation  
   Represents Washington State voters dedicated to fair representation in local, state, and federal elections, by increasing voter awareness of alternative methods of elections.
   http://www.fairvote.net/washington/

Fair Vote Canada  
   The primary purpose of Fair Vote Canada is to gain broad support for a national process to enable Canadian voters to choose which voting system shall be used to elect their representatives.
   http://www.fairvotecanada.org

Center for Voting and Democracy's Proportional Representation Library  
   Repository of articles about proportional representation.
   http://www.fairvote.org/pr/index.html