Martin, Joanne. (2002). Organizational Culture: Mapping the Terrain. Thousand Oaks, CA: Sage Publications, 2002. Budge, Ian, Hans-Dieter Klingemann, Andrea Volkens, Judith Bara, and Eric Tanenbaum. (2001). Mapping Policy Preferences: Estimates for Parties, Electors, and Governments 1945-1998. Oxford: Oxford University Press. Laver, Michael (ed). (2001). Estimating the Policy Positions of Political Actors. London: Routledge.