TY  - JOUR
T1  - Survey introductions and data quality
AU  - Couper, Mick P.
PY  - 1997
DO  - 10.1086/297797
SP  - 317
EP  - 338
JO  - Public Opinion Quarterly
VL  - 61
IS  - 2
SN  - 0033-362X
ER  -