TY - JOUR T1 - From confusion to clarity: Issues and American voters, 1956-1968 AU - Pomper, Gerald M. PY - 1972 SP - 415 EP - 428 JO - American Political Science Review VL - 66 IS - 2 SN - 0003-0554 UR - http://www.jstor.org/stable/1957786 ER -