TY  - GEN
AU  - Sarndal,  Carl-Erik
AU  -  Lundström, Sixten
TI  - Estimation in Surveys with nonresponse 
SN  - 9780470011355
PY  - 2005///
PB  - wiley
KW  - Survey Research Methods
KW  -  Sampling
UR  - http://onlinelibrary.wiley.com/book/10.1002/0470011351
ER  -