TY  - BOOK
AU  - Gerring, John
TI  - Social Science Methodology: : a unified framework
SN  - 978-0-521-13277-0
U1  - R 300.72 
PY  - 2014///
CY  - New York
PB  - Cambridge University Press
KW  - Social Science
KW  - Research Methods in Socail Sciences
ER  -