TY  - JOUR
T1  - Party Definition and Party Differentiation
AU  - Ladd, Everett Carll, Jr.
AU  - Hadley, Charles D.
PY  - 1973
DO  - 10.1086/268057
SP  - 21
EP  - 34
JO  - Public Opinion Quarterly
VL  - 37
IS  - 1
SN  - 0033-362X
ER  -