TY  - BOOK
AU  - Schuman Howard
AU  -  Presser Stanley
TI  - Questions and answers in attitude surveys:  Experiments on question forms,wording and Context   
U1  - Yb4, N6 
PY  - 1996///
CY  - London
PB  - Sage Publication         
N1  - Bibliography : P 351-362; Appendix : P 317-350
ER  -