TY  - BOOK
AU  - Halperin Sandra
AU  -  Heath Oliver
TI  - Political research :  Methods and practical skills
SN  - 9780199558414 (pbk)
U1  - W:f, Q2 
PY  - 2012///
CY  - Oxford
PB  - Oxford University Press UK     
KW  - POLITICAL SCIENCE
ER  -