National Election Studies (U.S.) · 3 obras en el catálogoObrasAAmerican national election studies, 1948-1997American national election studies, 1948-1997NNational election studies, 1952-1988, cumulative data fileNational election studies, 1952-1988, cumulative data fileAAmerican national election studyAmerican national election study
NNational election studies, 1952-1988, cumulative data fileNational election studies, 1952-1988, cumulative data file