@book{Budge:2001,
Address = {Oxford},
Author = {Budge, Ian AND Klingemann, Hans-Dieter AND Volkens, Andrea AND Bara, Judith AND Tanenbaum, Eric},
Publisher = {Oxford University Press},
Title = {Mapping Policy Preferences. Estimates for Parties, Electors, and Governments 1945-1998.},
Year = {2001}