TY  - JOUR
T1  - The decline of over-time comparability in the National Election Studies
AU  - Abramson, Paul R.
AU  - Miller, Warren E.
PY  - 1990
DO  - 10.1086/269195
SP  - 177
EP  - 190
JO  - Public Opinion Quarterly
VL  - 54
IS  - 2
SN  - 0033-362X
ER  -