TY - JOUR T1 - A Multivariate Explanation of Decreasing Turnout in Presidential Elections, 1960-1976 AU - Shaffer, Stephen D. PY - 1981 SP - 68 EP - 95 JO - American Journal of Political Science VL - 25 IS - 1 SN - 0092-5853 UR - http://www.jstor.org/stable/2110913 ER -