TY  - CONF
A1  - Roberts, C.
A1  - Jäckle, A.
A1  - Lynn, P.
T1  - Causes of mode effects: Separating out interviewer and stimulus effects in comparisons of face-to-face and telephone surveys
Y1  - 2006
UR  - http://repository.essex.ac.uk/id/eprint/8037
CY  - Montréal, Québec

ER  -