TY  - BOOK
AU  - De Leeuw Edith D.
AU  -  Dillman Don A.
AU  -  Hox Joop J.
TI  - International handbook of survey methodology
U1  - Sigma:f:(B28)g, P8(RR) 
PY  - 2008///
CY  - New York
PB  - Psychology Press USA   
KW  -  RESEARCH METHODS
KW  - SOCIAL SCIENCES
ER  -