TY  - BOOK
AU  - Saris, Willem E.
TI  - Variation in response functions: a source of measurement error in attitude research
SN  - 9070947080
U1  - 302.015195 SAR 
PY  - 1988///
CY  - Amsterdam
PB  - Sociometric Research Foundation
KW  - Variation response functions
N1  - Includes bibliography
ER  -