Here is a website from a “Comparative Research on Social Class and Voting Behaviour: A Theory and Methods Course” organized by two top comparative sociologists — Ganzeboom and Nieuwbeerta — at the Oslo Summer School in Comparative Social Science Studies in July 2005. It has PDF copies of classic class and voting articles and methodological articles related to social stratification. Not to be missed.
Classic Readings in Class and Voting
Political Inequality 