TY  - BOOK
AU  - Halperin, Sandra.
AU  - Heath, Oliver  .
TI  - Political research : methods and practical skills / 
SN  - 9780199558414
U1  - 320.72 
PY  - 2012///
CY  - New York : 
PB  - Oxford University Press , 
KW  - POLITICAL SCIENCE-RESEARCH
N1  - includes glossary and index
ER  -