RT Article T1 Postmaterialism, Collective Action, and Political Protest JF American journal of political science VO 34 IS 1 SP 212 OP 235 A1 Opp, Karl-Dieter 1937- LA German YR 1990 UL https://krimdok.uni-tuebingen.de/Record/1640003541 K1 Jugendliche K1 Postmaterialismus K1 Politischer Protest K1 Gewaltpotential K1 Anti-Atom-Bewegung