TY  - BOOK
AU  - Halperin,Sandra
AU  - Heath,Oliver
TI  - Political research:Methods and practical skills
SN  - 9780199558414 (pbk.)
U1  - 320.072 
PY  - 2012///
CY  - Oxford , New York 
PB  - Oxford University Press
KW  - Political science
ER  -